Azure subscription and service limits, quotas, and constraints

This document lists some of the most common Microsoft Azure limits, which are also sometimes called quotas.

To learn more about Azure pricing, see Azure pricing overview. There, you can estimate your costs by using the pricing calculator. You also can go to the pricing details page for a particular service, for example, Windows VMs. For tips to help manage your costs, see Prevent unexpected costs with Azure billing and cost management.

Managing limits

Note

Some services have adjustable limits.

When the limit can be adjusted, the tables include Default limit and Maximum limit headers. The limit can be raised above the default limit but not above the maximum limit. Some services with adjustable limits use different headers with information about adjusting the limit.

When a service doesn't have adjustable limits, the following tables use the header Limit without any additional information about adjusting the limit. In those cases, the default and the maximum limits are the same.

If you want to raise the limit or quota above the default limit, open an online customer support request at no charge.

The terms soft limit and hard limit often are used informally to describe the current, adjustable limit (soft limit) and the maximum limit (hard limit). If a limit isn't adjustable, there won't be a soft limit, only a hard limit.

Free Trial subscriptions aren't eligible for limit or quota increases. If you have a Free Trial subscription, you can upgrade to a Pay-As-You-Go subscription. For more information, see Upgrade your Azure Free Trial subscription to a Pay-As-You-Go subscription and the Free Trial subscription FAQ.

Some limits are managed at a regional level.

Let's use vCPU quotas as an example. To request a quota increase with support for vCPUs, you must decide how many vCPUs you want to use in which regions. You then request an increase in vCPU quotas for the amounts and regions that you want. If you need to use 30 vCPUs in West Europe to run your application there, you specifically request 30 vCPUs in West Europe. Your vCPU quota isn't increased in any other region--only West Europe has the 30-vCPU quota.

As a result, decide what your quotas must be for your workload in any one region. Then request that amount in each region into which you want to deploy. For help in how to determine your current quotas for specific regions, see Resolve errors for resource quotas.

General limits

For limits on resource names, see Naming rules and restrictions for Azure resources.

For information about Resource Manager API read and write limits, see Throttling Resource Manager requests.

Management group limits

The following limits apply to management groups.

Resource	Limit
Management groups per Microsoft Entra tenant	10,000
Subscriptions per management group	Unlimited.
Levels of management group hierarchy	Root level plus 6 levels1
Direct parent management group per management group	One
Management group level deployments per location	8002
Locations of Management group level deployments	10

¹The 6 levels don't include the subscription level.

²If you reach the limit of 800 deployments, delete deployments from the history that are no longer needed. To delete management group level deployments, use Remove-AzManagementGroupDeployment or az deployment mg delete.

Subscription limits

The following limits apply when you use Azure Resource Manager and Azure resource groups.

Resource	Limit
Azure subscriptions associated with a Microsoft Entra tenant	Unlimited
Coadministrators per subscription	Unlimited
Resource groups per subscription	980
Azure Resource Manager API request size	4,194,304 bytes
Tags per subscription1	50
Unique tag calculations per subscription2	80,000
Subscription-level deployments per location	8003
Locations of Subscription-level deployments	10

¹You can apply up to 50 tags directly to a subscription. Within the subscription, each resource or resource group is also limited to 50 tags. However, the subscription can contain an unlimited number of tags that are dispersed across resources and resource groups.

²Resource Manager returns a list of tag name and values in the subscription only when the number of unique tags is 80,000 or less. A unique tag is defined by the combination of resource ID, tag name, and tag value. For example, two resources with the same tag name and value would be calculated as two unique tags. You still can find a resource by tag when the number exceeds 80,000.

³Deployments are automatically deleted from the history as you near the limit. For more information, see Automatic deletions from deployment history.

Resource group limits

Resource	Limit
Resources per resource group	Resources aren't limited by resource group. Instead, they're limited by resource type in a resource group. See next row.
Resources per resource group, per resource type	800 - Some resource types can exceed the 800 limit. See Resources not limited to 800 instances per resource group.
Deployments per resource group in the deployment history	8001
Resources per deployment	800
Management locks per unique scope	20
Number of tags per resource or resource group	50
Tag key length	512
Tag value length	256

¹Deployments are automatically deleted from the history as you near the limit. Deleting an entry from the deployment history doesn't affect the deployed resources. For more information, see Automatic deletions from deployment history.

Template limits

Value	Limit
Parameters	256
Variables	256
Resources (including copy count)	800
Outputs	64
Template expression	24,576 chars
Resources in exported templates	200
Template size	4 MB
Resource definition size	1 MB
Parameter file size	4 MB

You can exceed some template limits by using a nested template. For more information, see Use linked templates when you deploy Azure resources. To reduce the number of parameters, variables, or outputs, you can combine several values into an object. For more information, see Objects as parameters.

You may get an error with a template or parameter file of less than 4 MB, if the total size of the request is too large. For more information about how to simplify your template to avoid a large request, see Resolve errors for job size exceeded.

Microsoft Entra ID limits

Here are the usage constraints and other service limits for the Microsoft Entra service.

Category	Limit
Tenants	A single user can belong to a maximum of 500 Microsoft Entra tenants as a member or a guest. Create a maximum of 200 tenants. Limit of 300 license-based subscriptions (such as Microsoft 365 subscriptions) per tenant
Domains	You can add no more than 5,000 managed domain names. If you set up all of your domains for federation with on-premises Active Directory, you can add no more than 2,500 domain names in each tenant.
Resources	By default, a maximum of 50,000 Microsoft Entra resources can be created in a single tenant by users of the Microsoft Entra ID Free edition. If you have at least one verified domain, the default Microsoft Entra service quota for your organization is extended to 300,000 Microsoft Entra resources. The Microsoft Entra service quota for organizations created by self-service sign-up remains 50,000 Microsoft Entra resources, even after you perform an internal admin takeover and the organization is converted to a managed tenant with at least one verified domain. This service limit is unrelated to the pricing tier limit of 500,000 resources on the Microsoft Entra pricing page. To go beyond the default quota, you must contact Microsoft Support. A non-admin user can create no more than 250 Microsoft Entra resources. Both active resources and deleted resources that are available to restore count toward this quota. Only deleted Microsoft Entra resources that were deleted fewer than 30 days ago are available to restore. Deleted Microsoft Entra resources that are no longer available to restore count toward this quota at a value of one-quarter for 30 days. If you have developers who are likely to repeatedly exceed this quota in the course of their regular duties, you can create and assign a custom role with permission to create a limitless number of app registrations. Resource limitations apply to all directory objects in a given Microsoft Entra tenant, including users, groups, applications, and service principals.
Schema extensions	String-type extensions can have a maximum of 256 characters. Binary-type extensions are limited to 256 bytes. Only 100 extension values, across all types and all applications, can be written to any single Microsoft Entra resource. Only User, Group, TenantDetail, Device, Application, and ServicePrincipal entities can be extended with string-type or binary-type single-valued attributes.
Applications	A maximum of 100 users and service principals can be owners of a single application. A user, group, or service principal can have a maximum of 1,500 app role assignments. The limitation is on the service principal, user, or group across all app roles and not on the number of assignments on a single app role. A user can have credentials configured for a maximum of 48 apps using password-based single sign-on. This limit only applies for credentials configured when the user is directly assigned the app, not when the user is a member of a group that is assigned. A group can have credentials configured for a maximum of 48 apps using password-based single sign-on. See more limits in Validation differences by supported account types.
Application manifest	A maximum of 1,200 entries can be added to the application manifest. See more limits in Validation differences by supported account types.
Groups	A non-admin user can create a maximum of 250 groups in a Microsoft Entra organization. Any Microsoft Entra admin who can manage groups in the organization can also create an unlimited number of groups (up to the Microsoft Entra object limit). If you assign a role to a user to remove the limit for that user, assign a less privileged, built-in role such as User Administrator or Groups Administrator. A Microsoft Entra organization can have a maximum of 15,000 dynamic groups and dynamic administrative units combined. A maximum of 500 role-assignable groups can be created in a single Microsoft Entra organization (tenant). A maximum of 100 users can be owners of a single group. Any number of Microsoft Entra resources can be members of a single group. A user can be a member of any number of groups. When security groups are being used in combination with SharePoint Online, a user can be a part of 2,049 security groups in total. This includes both direct and indirect group memberships. When this limit is exceeded, authentication and search results become unpredictable. By default, the number of members in a group that you can synchronize from your on-premises Active Directory to Microsoft Entra ID by using Microsoft Entra Connect is limited to 50,000 members. If you need to sync a group membership that's over this limit, you must onboard the Microsoft Entra Connect Sync V2 endpoint API. When you select a list of groups, you can assign a group expiration policy to a maximum of 500 Microsoft 365 groups. There is no limit when the policy is applied to all Microsoft 365 groups. At this time, the following scenarios are supported with nested groups: One group can be added as a member of another group, and you can achieve group nesting. Group membership claims. When an app is configured to receive group membership claims in the token, nested groups in which the signed-in user is a member are included. Conditional access (when a conditional access policy has a group scope). Restricting access to self-serve password reset. Restricting which users can do Microsoft Entra join and device registration. The following scenarios are not supported with nested groups: App role assignment, for both access and provisioning. Assigning groups to an app is supported, but any groups nested within the directly assigned group won't have access. Group-based licensing (assigning a license automatically to all members of a group). Microsoft 365 Groups.
Application Proxy	A maximum of 500 transactions* per second per Application Proxy application. A maximum of 750 transactions per second for the Microsoft Entra organization. *A transaction is defined as a single HTTP request and response for a unique resource. When clients are throttled, they'll receive a 429 response (too many requests). Transaction metrics are collected on each connector and can be monitored using performance counters under the object name Microsoft AAD App Proxy Connector.
Access Panel	There's no limit to the number of applications per user that can be displayed in the Access Panel, regardless of the number of assigned licenses.
Reports	A maximum of 1,000 rows can be viewed or downloaded in any report. Any other data is truncated.
Administrative units	A Microsoft Entra resource can be a member of no more than 30 administrative units. A maximum of 100 restricted management administrative units in a tenant. A Microsoft Entra organization can have a maximum of 15,000 dynamic groups and dynamic administrative units combined.
Microsoft Entra roles and permissions	A maximum of 100 Microsoft Entra custom roles can be created in a Microsoft Entra organization. A maximum of 150 Microsoft Entra custom role assignments for a single principal at any scope. A maximum of 100 Microsoft Entra built-in role assignments for a single principal at non-tenant scope (such as an administrative unit or Microsoft Entra object). There is no limit to Microsoft Entra built-in role assignments at tenant scope. For more information, see Assign Microsoft Entra roles at different scopes. A group can't be added as a group owner. A user's ability to read other users' tenant information can be restricted only by the Microsoft Entra organization-wide switch to disable all non-admin users' access to all tenant information (not recommended). For more information, see To restrict the default permissions for member users. It might take up to 15 minutes or you might have to sign out and sign back in before admin role membership additions and revocations take effect.
Conditional Access Policies	A maximum of 195 policies can be created in a single Microsoft Entra organization (tenant).
Terms of use	You can add no more than 40 terms to a single Microsoft Entra organization (tenant).
Multitenant organizations	A maximum of 5 active tenants, including the owner tenant. The owner tenant can add more than 5 pending tenants, but they won't be able to join the multitenant organization if the limit is exceeded. This limit is applied at the time a pending tenant joins a multitenant organization. A maximum of 100,000 internal users per active tenant. This limit is applied at the time a pending tenant joins a multitenant organization.

API Center limits

Resource	Free plan1	Standard plan2
Maximum number of APIs	2003	10,000
Maximum number of versions per API	5	100
Maximum number of definitions per version	5	5
Maximum number of deployments per API	10	10
Maximum number of environments	20	20
Maximum number of workspaces	1 (Default)	1 (Default)
Maximum number of custom metadata properties per entity3	10	20
Maximum number of child properties in custom metadata property of type "object"	10	10
Maximum requests per minute (data plane)	3,000	6,000
Maximum number of APIs accessed through data plane API	5	10,000
Maximum number of API definitions analyzed	10	2,0004
Maximum number of linked API sources5	1	3
Maximum number of APIs synchronized from a linked API source	200	2,0004

¹ Free plan provided for 90 days, then service is soft-deleted. Use of full service features including API analysis and access through the data plane API is limited.
² To increase a limit in the Standard plan, contact support.
³ Custom metadata properties assigned to APIs, deployments, and environments.
⁴ Process can take a few minutes to up to 24 hours to complete.
⁵ Sources such as linked API Management instances.

API Management limits

This section provides information about limits that apply to Azure API Management instances in different service tiers, including the following:

• API Management classic tiers
• API Management v2 tiers
• API Management workspaces
• Developer portal in API Management v2 tiers

Limits - API Management classic tiers

For certain API Management resources, limits are set only in the Consumption tier; in other API Management classic tiers, where indicated, these resources are unlimited. However, your practical upper limit depends on service configuration including pricing tier, service capacity, number of scale units, policy configuration, API definitions and types, number of concurrent requests, and other factors.

To request a limit increase, create a support request from the Azure portal. For more information, see Azure support plans.

Resource	Consumption	Developer	Basic	Standard	Premium
Maximum number of scale units	N/A (automatic scaling)	1	2	4	31 per region
Cache size (per unit)	External only	10 MiB	50 MiB	1 GiB	5 GiB
Concurrent back-end connections1 per HTTP authority	Unlimited	1,024	2,048 per unit	2,048 per unit	2,048 per unit
Maximum cached response size	2 MiB	2 MiB	2 MiB	2 MiB	2 MiB
Maximum policy document size	16 KiB	256 KiB	256 KiB	256 KiB	256 KiB
Maximum custom gateway domains per service instance	N/A	20	N/A	N/A	20
Maximum number of CA certificates per service instance	N/A	10	10	10	10
Maximum number of service instances per Azure subscription	20	Unlimited	Unlimited	Unlimited	Unlimited
Maximum number of subscriptions per service instance	500	Unlimited	Unlimited	Unlimited	Unlimited
Maximum number of client certificates per service instance	50	Unlimited	Unlimited	Unlimited	Unlimited
Maximum number of APIs per service instance	50	Unlimited	Unlimited	Unlimited	Unlimited
Maximum number of API operations per service instance	1,000	Unlimited	Unlimited	Unlimited	Unlimited
Maximum total request duration	30 seconds	Unlimited	Unlimited	Unlimited	Unlimited
Maximum request payload size	1 GiB	Unlimited	Unlimited	Unlimited	Unlimited
Maximum buffered payload size	2 MiB	500 MiB	500 MiB	500 MiB	500 MiB
Maximum request/response payload size in diagnostic logs	8,192 bytes	8,192 bytes	8,192 bytes	8,192 bytes	8,192 bytes
Maximum request URL size2	16,384 bytes	Unlimited	Unlimited	Unlimited	Unlimited
Maximum character length of URL path segment	1,024	1,024	1,024	1,024	1,024
Maximum character length of named value	4,096	4,096	4,096	4,096	4,096
Maximum size of API schema used by validation policy	4 MB	4 MB	4 MB	4 MB	4 MB
Maximum number of schemas	100	100	100	100	100
Maximum size of request or response body in validate-content policy	100 KiB	100 KiB	100 KiB	100 KiB	100 KiB
Maximum number of self-hosted gateways3	N/A	25	N/A	N/A	25
Maximum number of active WebSocket connections per unit4	N/A	2,500	5,000	5,000	5,000
Maximum number of tags supported by an API Management resource	15	15	15	15	15
Maximum number of credential providers per service instance	1,000	1,000	1,000	1,000	1,000
Maximum number of connections per credential provider	10,000	10,000	10,000	10,000	10,000
Maximum number of access policies per connection	100	100	100	100	100
Maximum number of authorization requests per minute per connection	250	250	250	250	250
Maximum number of workspaces per service instance	N/A	N/A	N/A	N/A	100

¹ Connections are pooled and reused unless explicitly closed by the backend.
² Includes an up to 2048-bytes long query string.
³ The number of nodes (or replicas) associated with a self-hosted gateway resource is unlimited in the Premium tier and capped at a single node in the Developer tier.
⁴ Up to a maximum of 60,000 connections per service instance.

Limits - API Management v2 tiers

To request a limit increase, create a support request from the Azure portal. For more information, see Azure support plans.

Resource	Basic v2	Standard v2	Premium v2
Maximum number of scale units	10	10	30
Maximum cache size per service instance	250 MB	1 GB	5 GB
Maximum number of APIs per service instance	150	500	2,500
Maximum number of API operations per service instance	3,000	10,000	20,000
Maximum number of subscriptions per service instance	500	2,000	4,000
Maximum number of products per service instance	50	200	400
Maximum number of users per service instance	300	2,000	4,000
Maximum number of groups per service instance	20	100	200
Maximum number of authorization servers per service instance	10	500	500
Maximum number of policy fragments per service instance	50	50	100
Maximum number of OpenID Connect providers per service instance	10	10	20
Maximum number of certificates per service instance	100	100	100
Maximum number of backends per service instance	100	100	100
Maximum number of caches per service instance	100	100	100
Maximum number of named values per service instance	100	100	100
Maximum number of loggers per service instance	100	100	100
Maximum number of schemas per service instance	100	100	100
Maximum number of schemas per API	100	100	100
Maximum number of tags per service instance	100	100	100
Maximum number of tags per API	100	100	100
Maximum number of version sets per service instance	100	100	100
Maximum number of releases per API	100	100	100
Maximum number of operations per API	100	100	100
Maximum number of GraphQL resolvers per service instance	100	100	100
Maximum number of GraphQL resolvers per API	100	100	100
Maximum number of APIs per product	100	100	100
Maximum number of APIs per subscription	100	100	100
Maximum number of products per subscription	100	100	100
Maximum number of groups per product	100	100	100
Maximum number of tags per product	100	100	100
Concurrent back-end connections1 per HTTP authority	2,048	2,048	2,048
Maximum cached response size	2 MiB	2 MiB	2 MiB
Maximum policy document size	256 KiB	256 KiB	256 KiB
Maximum request payload size	1 GiB	1 GiB	1 GiB
Maximum buffered payload size	2 MiB	2 MiB	2 MiB
Maximum request/response payload size in diagnostic logs	8,192 bytes	8,192 bytes	8,192 bytes
Maximum request URL size2	16,384 bytes	16,384 bytes	16,384 bytes
Maximum length of URL path segment	1,024 characters	1,024 characters	1,024 characters
Maximum character length of named value	4,096 characters	4,096 characters	4,096 characters
Maximum size of request or response body in validate-content policy	100 KiB	100 KiB	100 KiB
Maximum size of API schema used by validation policy	4 MB	4 MB	4 MB
Maximum number of active WebSocket connections per unit3	5,000	5,000	5,000

¹ Connections are pooled and reused unless explicitly closed by the backend.
² Includes an up to 2048-bytes long query string.
³ Up to a maximum of 60,000 connections per service instance.

Limits - API Management workspaces

The following are resource limits per workspace in Azure API Management:

Resource	Workspace - Premium tier
Maximum number of workspaces per instance	100
Maximum number of scale units per premium workspace gateway	12
Maximum number of APIs (including versions and revisions)	200
Maximum number of API operations	5,000
Maximum number of operations per API	100
Maximum number of releases per API	100
Maximum number of schemas per API	100
Maximum number of subscriptions per API	200
Maximum number of tags per API	100
Maximum number of backends	200
Maximum number of certificates	200
Maximum number of groups	50
Maximum number of loggers	50
Maximum number of named values	200
Maximum number of policy fragments	50
Maximum number of products	100
Maximum number of APIs per product	200
Maximum number of groups per product	200
Maximum number of subscriptions per product	1,000
Maximum number of tags per product	50
Maximum number of schemas	500
Maximum number of subscriptions	5,000
Maximum number of tags	200
Maximum number of groups per user	200
Maximum number of version sets	50

Limits - Developer portal in API Management v2 tiers

Item	Basic v2	Standard v2	Premium v2
Maximum number of media files to upload	15	15	15
Maximum size of a media file	500 KB	500 KB	500 KB
Maximum number of pages	30	50	50
Maximum number of widgets1	30	50	50
Maximum size of metadata per page	350 KB	350 KB	350 KB
Maximum size of metadata per widget1	350 KB	350 KB	350 KB
Maximum number of client requests per minute	200	200	200

¹ Limit for built-in widgets such as text, images, or APIs list. Currently, custom widgets and custom HTML code widgets aren't supported in the v2 tiers.

App Service limits

Resource	Free	Shared	Basic	Standard	Premium (v1-v3)	Isolated
Web, mobile, or API apps per Azure App Service plan1	10	100	Unlimited2	Unlimited2	Unlimited2	Unlimited2
App Service plan	10 per region	10 per resource group	100 per resource group	100 per resource group	100 per resource group	100 per resource group
Compute instance type	Shared	Shared	Dedicated3	Dedicated3	Dedicated3	Dedicated3
Scale out (maximum instances)	1 shared	1 shared	3 dedicated3	10 dedicated3	20 dedicated for v1; 30 dedicated for v2 and v3.3	100 dedicated4
Storage5	1 GB5	1 GB5	10 GB5	50 GB5	250 GB5	1 TB12 The available storage quota is 999 GB.
CPU time (5 minutes)6	3 minutes	3 minutes	Unlimited, pay at standard rates	Unlimited, pay at standard rates	Unlimited, pay at standard rates	Unlimited, pay at standard rates
CPU time (day)6	60 minutes	240 minutes	Unlimited, pay at standard rates	Unlimited, pay at standard rates	Unlimited, pay at standard rates	Unlimited, pay at standard rates
Memory (1 hour)	1,024 MB per App Service plan	1,024 MB per app	N/A	N/A	N/A	N/A
Bandwidth	165 MB	Unlimited, data transfer rates apply	Unlimited, data transfer rates apply	Unlimited, data transfer rates apply	Unlimited, data transfer rates apply	Unlimited, data transfer rates apply
Application architecture	32-bit	32-bit	32-bit/64-bit	32-bit/64-bit	32-bit/64-bit	32-bit/64-bit
WebSockets per instance (Windows)7	5	35	350	Unlimited	Unlimited	Unlimited
WebSockets per instance (Linux)7	5	N/A	~50K	~50K	~50K	~50K
Outbound IP connections per instance	600	600	Depends on instance size8	Depends on instance size8	Depends on instance size8	16,000
Concurrent debugger connections per application	1	1	1	5	5	5
App Service Certificates per subscription	Not supported	Not supported	10	10	10	10
Custom domains per app	0 (azurewebsites.net subdomain only)	500	500	500	500	500
Custom domain SSL support	Not supported, wildcard certificate for *.azurewebsites.net available by default	Not supported, wildcard certificate for *.azurewebsites.net available by default	Unlimited SNI SSL connections	Unlimited SNI SSL and 1 IP SSL connections included	Unlimited SNI SSL and 1 IP SSL connections included	Unlimited SNI SSL and 1 IP SSL connections included
Hybrid connections			5 per plan	25 per plan	220 per app	220 per app
Virtual Network Integration			X	X	X	X
Private Endpoints			100 per app	100 per app	100 per app
Integrated load balancer		X	X	X	X	X9
Access restrictions	512 rules per app	512 rules per app	512 rules per app	512 rules per app	512 rules per app	512 rules per app
Always On			X	X	X	X
Scheduled backups			Scheduled backups every 2 hours, a maximum of 12 backups per day (manual + scheduled	Scheduled backups every 2 hours, a maximum of 12 backups per day (manual + scheduled)	Scheduled backups every hour, a maximum of 50 backups per day (manual + scheduled)	Scheduled backups every hour, a maximum of 50 backups per day (manual + scheduled)
Autoscale				X	X	X
WebJobs10	X	X	X	X	X	X
Endpoint monitoring			X	X	X	X
Staging slots per app				5	20	20
Testing in Production				X	X	X
Diagnostic Logs	X	X	X	X	X	X
Kudu	X	X	X	X	X	X
Authentication and Authorization	X	X	X	X	X	X
App Service Managed Certificates11			X	X	X	X
SLA			99.95%	99.95%	99.95%	99.95%

¹ Apps and storage quotas are per App Service plan unless noted otherwise.

² The actual number of apps that you can host on these machines depends on the activity of the apps, the size of the machine instances, and the corresponding resource utilization.

³ Dedicated instances can be of different sizes. For more information, see App Service pricing.

⁴ More are allowed upon request.

⁵ The storage limit is the total content size across all apps in the same App service plan. The total content size of all apps across all App service plans in a single resource group and region cannot exceed 500 GB. The file system quota for App Service hosted apps is determined by the aggregate of App Service plans created in a region and resource group.

⁶ These resources are constrained by physical resources on the dedicated instances (the instance size and the number of instances).

⁷If you scale a Windows app in the Basic tier to two instances, you have 350 concurrent connections for each of the two instances. For Windows apps on Standard tier and above, there are no theoretical limits to WebSockets, but other factors can limit the number of WebSockets. For example, maximum concurrent requests allowed (defined by maxConcurrentRequestsPerCpu) are: 7,500 per small VM, 15,000 per medium VM (7,500 x 2 cores), and 75,000 per large VM (18,750 x 4 cores). Linux apps are limited 5 concurrent WebSocket connections on Free SKU and ~50k concurrent WebSocket connections per instance on all other SKUs.

⁸ The maximum IP connections are per instance and depend on the instance size: 1,920 per B1/S1/P0V3/P1V3 instance, 3,968 per B2/S2/P2V3 instance, 8,064 per B3/S3/P3V3 instance.

⁹ App Service Isolated SKUs can be internally load balanced (ILB) with Azure Load Balancer, so there's no public connectivity from the internet. As a result, some features of an ILB Isolated App Service must be used from machines that have direct access to the ILB network endpoint.

¹⁰ Run custom executables and/or scripts on demand, on a schedule, or continuously as a background task within your App Service instance. Always On is required for continuous WebJobs execution. There's no predefined limit on the number of WebJobs that can run in an App Service instance. There are practical limits that depend on what the application code is trying to do.

¹¹ Only issuing standard certificates (wildcard certificates aren't available). Limited to only one free certificate per custom domain.

¹² Total storage usage across all apps deployed in a single App Service Environment (regardless of how they're allocated across different resource groups).

Automation limits

Process automation

Resource	Limit	Notes
Maximum number of new jobs that can be submitted every 30 seconds per Azure Automation account	100	When this limit is reached, the subsequent requests to create a job fail. The client receives an error response.
Maximum number of concurrent running jobs at the same instance of time per Automation account	200	When this limit is reached, the subsequent requests to create a job fail. The client receives an error response. Free trial and Azure for Student subscriptions can run up to 10 concurrent jobs at the same instance of time per Automation account. 2
Maximum number of Automation accounts in a subscription in a region.	No limit 2 1	Enterprise and MSDN subscriptions can create Automation accounts in any of the regions supported by the service Pay-as-you-go, MPN, Azure Pass subscriptions can create 2 Automation accounts per subscription in any of the regions supported by the service. Free trial and Azure for Student subscriptions can create only one Automation account per region per subscription. Allowed list of regions: EastUS, EastUS2, WestUS, NorthEurope, SoutheastAsia, and JapanWest2
Maximum storage size of job metadata for a 30-day rolling period	10 GB (approximately 4 million jobs)	When this limit is reached, the subsequent requests to create a job fail.
Maximum job stream limit	1 MiB	A single stream cannot be larger than 1 MiB.
Maximum job stream limit on Azure Automation portal	200KB	Portal limit to show the job logs.
Maximum number of modules that can be imported every 30 seconds per Automation account	5
Maximum size of a module	100 MB
Maximum size of a node configuration file	1 MB	Applies to state configuration
Job run time, Free tier	500 minutes per subscription per calendar month
Maximum amount of disk space allowed per sandbox1	1 GB	Applies to Azure sandboxes only.
Maximum amount of memory given to a sandbox1	400 MB	Applies to Azure sandboxes only.
Maximum number of network sockets allowed per sandbox1	1,000	Applies to Azure sandboxes only.
Maximum runtime allowed per runbook1	3 hours	Applies to Azure sandboxes only.
Maximum number of system hybrid runbook workers per Automation Account	4,000
Maximum number of user hybrid runbook workers per Automation Account	4,000
Maximum number of concurrent jobs that can be run on a single Hybrid Runbook Worker	50
Maximum runbook job parameter size	512 kilobytes
Maximum runbook parameters	50	If you reach the 50-parameter limit, you can pass a JSON or XML string to a parameter and parse it with the runbook.
Maximum webhook payload size	512 kilobytes
Maximum days that job data is retained	30 days
Maximum PowerShell workflow state size	5 MB	Applies to PowerShell workflow runbooks when checkpointing workflow.
Maximum number of tags supported by an Automation account	15
Maximum number of characters in the value field of a variable	1048576

¹A sandbox is a shared environment that can be used by multiple jobs. Jobs that use the same sandbox are bound by the resource limitations of the sandbox.
²To request a limit increase, create an Azure Support request. Free subscriptions including Azure Free Account and Azure for Students aren't eligible for limit or quota increases. If you have a free subscription, you can upgrade to Pay-As-You-Go subscription.

Change Tracking and Inventory

The following table shows the tracked item limits per machine for change tracking.

Resource	Limit	Notes
File	500
File size	5 MB
Registry	250
Windows software	250	Doesn't include software updates.
Linux packages	1,250
Services	250
Daemon	250

Azure Update Manager

The following are the Dynamic scope recommended limits for each dynamic scope:

Resource	Limit
Resource associations	1000
Number of tag filters	50
Number of Resource Group filters	50

The following are the limits for schedule patching:

Indicator	Public Cloud Limit	Mooncake/Fairfax Limit
Number of schedules per subscription per region	250	250
Total number of resource associations to a schedule	3,000	3,000
Resource associations on each dynamic scope	1,000	1,000
Number of dynamic scopes per resource group or subscription per region	250	250
Number of dynamic scopes per schedule	200	100
Total number of subscriptions attached to all dynamic scopes per schedule	200	100

Azure App Configuration

Resource	Limit	Comment
Configuration stores for Free tier	One store per region per subscription.
Configuration stores for Standard tier	Unlimited stores per subscription.
Configuration stores for Premium tier	Unlimited stores per subscription.
Configuration store requests for Free tier	1,000 requests per day	Once the quota is exhausted, HTTP status code 429 is returned for all requests until the end of the day.
Configuration store requests for Standard tier	30,000 per hour	Once the quota is exhausted, requests may return HTTP status code 429 indicating Too Many Requests - until the end of the hour.
Configuration store requests for Premium tier	No quota limit on requests.
Throughput for Free tier	No guaranteed throughput.
Throughput for Standard tier	Allow up to 300 requests per second (RPS) for read requests and up to 60 RPS for write requests.
Throughput for Premium tier	Allow up to 450 requests per second (RPS) for read requests and up to 100 RPS for write requests.
Storage for Free tier	10 MB	There is no limit on the number of keys and labels as long as their total size is below the storage limit.
Storage for Standard tier	1 GB	There is no limit on the number of keys and labels as long as their total size is below the storage limit.
Storage for Premium tier	4 GB	There is no limit on the number of keys and labels as long as their total size is below the storage limit.
Keys and values	10 KB	For a single key-value item, including all metadata.
Snapshots storage for Free tier	10 MB	Snapshots storage is extra and in addition to "Storage for Free Tier". Storage for both archived and active snapshots is counted towards this limit.
Snapshots storage for Standard tier	1 GB	Snapshots storage is extra and in addition to "Storage for Standard Tier". Storage for both archived and active snapshots is counted towards this limit.
Snapshots storage for Premium tier	4 GB	Snapshots storage is extra and in addition to "Storage for Premium Tier". Storage for both archived and active snapshots is counted towards this limit.
Snapshot size	1 MB

Azure Cache for Redis limits

Resource	Limit
Cache size	1.2 TB
Databases	64
Maximum connected clients	40,000
Azure Cache for Redis replicas, for high availability	3
Shards in a premium cache with clustering	10

Azure Cache for Redis limits and sizes are different for each pricing tier. To see the pricing tiers and their associated sizes, see Azure Cache for Redis pricing.

For more information on Azure Cache for Redis configuration limits, see Default Redis server configuration.

Because configuration and management of Azure Cache for Redis instances is done by Microsoft, not all Redis commands are supported in Azure Cache for Redis. For more information, see Redis commands not supported in Azure Cache for Redis.

Azure Cloud Services limits

Resource	Limit
Web or worker roles per deployment1	25
Instance input endpoints per deployment	25
Input endpoints per deployment	25
Internal endpoints per deployment	25
Hosted service certificates per deployment	199

¹Each Azure Cloud Service with web or worker roles can have two deployments, one for production and one for staging. This limit refers to the number of distinct roles, that is, configuration. This limit doesn't refer to the number of instances per role, that is, scaling.

Azure AI Search limits

Pricing tiers determine the capacity and limits of your search service. Tiers include:

• Free multitenant service, shared with other Azure subscribers, is intended for evaluation and small development projects.
• Basic provides dedicated computing resources for production workloads at a smaller scale, with up to three replicas for highly available query workloads.
• Standard, which includes S1, S2, S3, and S3 High Density, is for larger production workloads. Multiple levels exist within the Standard tier so that you can choose a resource configuration that best matches your workload profile.

Limits per subscription

You can create multiple billable search services (Basic and higher), up to the maximum number of services allowed at each tier, per region. For example, you could create up to 16 services at the Basic tier and another 16 services at the S1 tier within the same subscription and region. You could then create an additional 16 Basic services in another region for a combined total of 32 Basic services under the same subscription. For more information about tiers, see Choose a tier (or SKU) for Azure AI Search.

Maximum service limits can be raised upon request. If you need more services within the same subscription, file a support request.

Resource	Free 1	Basic	S1	S2	S3	S3 HD	L1	L2
Maximum services per region	1	16	16	8	6	6	6	6
Maximum search units (SU)2	N/A	3 SU	36 SU	36 SU	36 SU	36 SU	36 SU	36 SU

¹ You can have one free search service per Azure subscription. The free tier is based on infrastructure shared with other customers. Because the hardware isn't dedicated, scale-up isn't supported, and storage is limited to 50 MB. A free search service might be deleted after extended periods of inactivity to make room for more services.

² Search units (SU) are billing units, allocated as either a replica or a partition. You need both. To learn more about SU combinations, see Estimate and manage capacity of a search service.

Limits per search service

The following table covers SLA, partition counts, and replica counts at the service level.

Resource	Free	Basic	S1	S2	S3	S3 HD	L1	L2
Service level agreement (SLA)	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Partitions	N/A	3 1	12	12	12	3	12	12
Replicas	N/A	3	12	12	12	12	12	12

¹ Basic tier supports three partitions and three replicas, for a total of nine search units (SU) on new search services created after April 3, 2024. Older basic services are limited to one partition and three replicas.

A search service is subject to a maximum storage limit (partition size multiplied by the number of partitions) or by a hard limit on the maximum number of indexes or indexers, whichever comes first.

Service level agreements (SLAs) apply to billable services having two or more replicas for query workloads, or three or more replicas for query and indexing workloads. The number of partitions isn't an SLA consideration. For more information, see Reliability in Azure AI Search.

Free services don't have fixed partitions or replicas and they share resources with other subscribers.

Partition storage (GB)

Per-service storage limits vary by two things: service creation date, and region. There are higher limits for newer services in most supported regions.

This table shows the progression of storage quota increases in GB over time. Higher capacity partitions were brought online starting in April 2024, in the regions listed in the footnotes. Higher capacity is limited to new search services. There's no in-place upgrade at this time.

Service creation date	Basic	S1	S2	S3/HD	L1	L2
Before April 3, 2024	2	25	100	200	1,024	2,048
April 3, 2024 through May 17, 2024 1	15	160	512	1,024	1,024	2,048
After May 17, 2024 2	15	160	512	1,024	2,048	4,096

¹ Higher capacity storage for Basic, S1, S2, S3 in these regions. Americas: Brazil South​, Canada Central​, Canada East​​, East US​, East US 2, ​Central US​, North Central US​, South Central US​, West US​, West US 2​, West US 3​, West Central US. Europe: France Central​. Italy North​​, North Europe​​, Norway East, Poland Central​​, Switzerland North​, Sweden Central​, UK South​, UK West​. Middle East: UAE North. Africa: South Africa North. Asia Pacific: Australia East​, Australia Southeast​​, Central India, Jio India West​, East Asia, Southeast Asia​, Japan East, Japan West​, Korea Central, Korea South​.

² Higher capacity storage for L1 and L2. More regions provide higher capacity at every billable tier. Europe: Germany North​, Germany West Central, Switzerland West​. Azure Government: Texas, Arizona, Virginia. Africa: South Africa North​. Asia Pacific: China North 3, China East 3.

A few regions still run on older infrastructure, subject to the April 3 limits. Before creating a new service, check supported regions to make sure your region of choice provides the extra capacity.

To learn more about limits on a more granular level, such as document size, queries per second, keys, requests, and responses, see Service limits in Azure AI Search.

Azure AI services limits

The following limits are for the number of Azure AI services resources per Azure subscription. There is a limit of only one allowed 'Free' account, per resource type, per subscription. Each of the Azure AI services may have other limitations, for more information, see Azure AI services.

Type	Limit	Example
A mixture of Azure AI services resources	Maximum of 200 total Azure AI services resources per region.	100 Azure AI Vision resources in West US, 50 Azure AI Speech resources in West US, and 50 Azure AI Language resources in West US.
A single type of Azure AI services resources.	Maximum of 100 resources per region	100 Azure AI Vision resources in West US 2, and 100 Azure AI Vision resources in East US.

Azure Chaos Studio limits

For Azure Chaos Studio limits, see Azure Chaos Studio service limits.

Azure Communications Gateway limits

Some of the following default limits and quotas can be increased. To request a change, create a change request stating the limit you want to change.

The following restrictions apply to all Azure Communications Gateways:

• All traffic must use IPv4.
• All traffic must use TLS 1.2 or greater. Earlier versions aren't supported.
• The number of active calls is limited to 15% of the number of users assigned to Azure Communications Gateway. For the definition of users, see Plan and manage costs for Azure Communications Gateway.
• The number of calls being actively transcoded is limited to 5% of the total number of active calls.

Azure Communications Gateway also has limits on the SIP signaling.

Resource	Limit
Maximum SIP message size	10 Kilobytes
Maximum length of an SDP message body	128 Kilobytes
Maximum length of request URI	256 Bytes
Maximum length of Contact header URI	256 Bytes
Maximum length of the userinfo part of a URI	256 Bytes
Maximum length of domain name in From header	255 Bytes
Maximum length of a SIP header's name	32 Bytes
Maximum length of a SIP body name	64 Bytes
Maximum length of a Supported, Require or Proxy-Require header	256 Bytes
Maximum length of a SIP option-tag	32 Bytes

Some endpoints might add parameters in the following headers to an in-dialog message when those parameters weren't present in the dialog-creating message. In that case, Azure Communications Gateway strips the parameters, because RFC 3261 doesn't permit this behavior.

• Request URI
• To header
• From header

The Provisioning API has a rate limit of 100 requests per minute, applied across all the resources. A batch request to update multiple resources counts as one request.

Azure Container Apps limits

For Azure Container Apps limits, see Quotas in Azure Container Apps.

The amount of disk space available to your application varies based on the associated workload profile. Available disk space determines the image size limit you can deploy to your container apps.

For dedicated workload profiles, the image size limit is per instance.

Display name	Name	Image Size Limit (GB)
Consumption	consumption	8*
Dedicated-D4	D4	90
Dedicated-D8	D8	210
Dedicated-D16	D16	460
Dedicated-D32	D32	940
Dedicated-E4	E4	90
Dedicated-E8	E8	210
Dedicated-E16	E16	460
Dedicated-E32	E32	940
Dedicated-NC24-A100 (preview)	NC24-A100	210
Dedicated-NC48-A100 (preview)	NC48-A100	460
Dedicated-NC96-A100 (preview)	NC96-A100	940

* The image size limit for a consumption workload profile is a shared among both image and app. For example, logs used by your app are subject to this size limit.

Azure Cosmos DB limits

For Azure Cosmos DB limits, see Limits in Azure Cosmos DB.

Azure Data Explorer limits

The following table describes the maximum limits for Azure Data Explorer clusters.

Resource	Limit
Clusters per region per subscription	20
Instances per cluster	1,000
Number of databases in a cluster	10,000
Number of follower clusters (data share consumers) per leader cluster (data share producer)	100

Note

You can request higher limits for Number of databases in a cluster and Clusters per region per subscription. To request an increase, contact Azure Support.

The following table describes the limits on management operations performed on Azure Data Explorer clusters.

Scope	Operation	Limit
Cluster	read (for example, get a cluster)	500 per 5 minutes
Cluster	write (for example, create a database)	1,000 per hour

Azure Database for MySQL

For Azure Database for MySQL limits, see Limitations in Azure Database for MySQL.

Azure Database for PostgreSQL

For Azure Database for PostgreSQL limits, see Limitations in Azure Database for PostgreSQL.

Azure Deployment Environments limits

Subscription	Runtime limit per deployment​	Runtime limit per month per region per subscription​	Storage limit per Environment​
Enterprise	30 min	5000 min	1 GB
Pay as you go	10 min	200 min	1 GB
Azure Pass	10 min	200 min	1 GB
MSDN	10 min	200 min	1 GB
CSP	10 min	200 min	1 GB
Free trial	10 min	200 min	1 GB
Azure for students	10 min	200 min	1 GB

Azure Files and Azure File Sync

To learn more about the limits for Azure Files and File Sync, see Azure Files scalability and performance targets.

Azure Functions limits

Resource	Flex Consumption plan	Premium plan	Dedicated plan/ASE	Container Apps	Consumption plan
Default timeout duration (min)	30	30	301	3016	5
Max timeout duration (min)	unbounded9	unbounded9	unbounded2	unbounded17	10
Max outbound connections (per instance)	unbounded	unbounded	unbounded	unbounded	600 active (1200 total)
Max request size (MB)3	210	210	210	210	210
Max query string length3	4096	4096	4096	4096	4096
Max request URL length3	8192	8192	8192	8192	8192
ACU per instance	210-840	100-840/210-25010	varies	100	varies
Max memory (GB per instance)	4<sup4	3.5-14	1.75-256/8-256	varies	1.5
Max instance count (Windows/Linux)	100/20	varies by SKU/10011	10-30018	200/100	1000 15
Function apps per plan13	100	100	unbounded4	unbounded4	100
App Service plans	n/a	100 per resource group	100 per resource group	n/a	100 per region
Deployment slots per app12	n/a	3	1-2011	not supported	2
Storage (temporary)5	0.8 GB	21-140 GB	11-140 GB	n/a	0.5 GB
Storage (persisted)	0 GB7	250 GB	10-1000 GB11	n/a	1 GB6,7
Custom domains per app	500	500	500	not supported	5007
Custom domain SSL support	unbounded SNI SSL and 1 IP SSL connections included	unbounded SNI SSL and 1 IP SSL connections included	unbounded SNI SSL and 1 IP SSL connections included	not supported	unbounded SNI SSL connection included

Notes on service limits:

1. By default, the timeout for the Functions 1.x runtime in an App Service plan is unbounded.
2. Requires the App Service plan be set to Always On. Pay at standard rates. A grace period of 10 minutes is given during platform updates.
3. These limits are set in the host.
4. The actual number of function apps that you can host depends on the activity of the apps, the size of the machine instances, and the corresponding resource utilization.
5. The storage limit is the total content size in temporary storage across all apps in the same App Service plan. For Consumption plans on Linux, the storage is currently 1.5 GB.
6. Consumption plan uses an Azure Files share for persisted storage. When you provide your own Azure Files share, the specific share size limits depend on the storage account you set for WEBSITE_CONTENTAZUREFILECONNECTIONSTRING.
7. On Linux, you must explicitly mount your own Azure Files share.
8. When your function app is hosted in a Consumption plan, only the CNAME option is supported. For function apps in a Premium plan or an App Service plan, you can map a custom domain using either a CNAME or an A record.
9. There is no maximum execution timeout duration enforced. However, the grace period given to a function execution is 60 minutes during scale in and 10 minutes during platform updates.
10. Workers are roles that host customer apps. Workers are available in three fixed sizes: One vCPU/3.5 GB RAM; Two vCPU/7 GB RAM; Four vCPU/14 GB RAM.
11. See App Service limits for details.
12. Including the production slot.
13. There's currently a limit of 5000 function apps in a given subscription.
14. Flex Consumption plan instance sizes are currently defined as either 2,048 MB or 4,096 MB. For more information, see Instance memory.
15. Flex Consumption plan has a regional subscription quota that limits the total memory usage of all instances across a given region. For more information, see Instance memory.
16. When the minimum number of replicas is set to zero, the default timeout depends on the specific triggers used in the app.
17. When the minimum number of replicas is set to one or more.
18. On Container Apps, you can set the maximum number of replicas, which is honored as long as there's enough cores quota available.

For more information, see Functions Hosting plans comparison.

Azure Health Data Services

Azure Health Data Services limits

Health Data Services is a set of managed API services based on open standards and frameworks. Health Data Services enables workflows to improve healthcare and offers scalable and secure healthcare solutions. Health Data Services includes Fast Healthcare Interoperability Resources (FHIR) service, the Digital Imaging and Communications in Medicine (DICOM) service, and MedTech service.

FHIR service is an implementation of the FHIR specification within Health Data Services. It enables you to combine in a single workspace one or more FHIR service instances with optional DICOM and MedTech service instances. Azure API for FHIR is generally available as a stand-alone service offering.

Each FHIR service instance in Azure Health Data Services has a storage limit of 4 TB by default. If you have more data, you can ask Microsoft to increase storage up to 100 TB for your FHIR service. To request storage greater than 4 TB, create a support request on the Azure portal and use the issue type Service and Subscription limit (quotas).

Quota Name	Default Limit	Maximum Limit	Notes
Workspace	10	Contact support	Limit per subscription
FHIR	10	Contact support	Limit per workspace
DICOM	10	Contact support	Limit per workspace
MedTech	10	N/A	Limit per workspace, can't be increased

Azure API for FHIR service limits

Azure API for FHIR is a managed, standards-based, compliant API for clinical health data that enables solutions for actionable analytics and machine learning.

Quota Name	Default Limit	Maximum Limit	Notes
Request Units (RUs)	100,000 RUs	Contact support Maximum available is 1,000,000.	You need a minimum of 400 RUs or 40 RUs/GB, whichever is larger.
Concurrent connections	15 concurrent connections on two instances (for a total of 30 concurrent requests)	Contact support
Azure API for FHIR Service Instances per Subscription	10	Contact support

Azure Kubernetes Service limits

Resource	Limit
Maximum clusters per subscription globally	5,000
Maximum clusters per subscription per region 1	100
Maximum nodes per cluster with Virtual Machine Scale Sets and Standard Load Balancer SKU	5,000 across all node pools Note: If you're unable to scale up to 5,000 nodes per cluster, see Best Practices for Large Clusters.
Maximum nodes per node pool (Virtual Machine Scale Sets node pools)	1000
Maximum node pools per cluster	100
Maximum pods per node: with Kubenet networking plug-in1	Maximum: 250 Azure CLI default: 110 Azure Resource Manager template default: 110 Azure portal deployment default: 30
Maximum pods per node: with Azure Container Networking Interface (Azure CNI)2	Maximum: 250 Maximum recommended for Windows Server containers: 110 Default: 30
Open Service Mesh (OSM) AKS addon	Kubernetes Cluster Version: AKS Supported Versions OSM controllers per cluster: 1 Pods per OSM controller: 1600 Kubernetes service accounts managed by OSM: 160
Maximum load-balanced kubernetes services per cluster with Standard Load Balancer SKU	300
Maximum nodes per cluster with Virtual Machine Availability Sets and Basic Load Balancer SKU	100

¹ More are allowed upon request.
² Windows Server containers must use Azure CNI networking plug-in. Kubenet isn't supported for Windows Server containers.

Kubernetes Control Plane tier	Limit
Standard tier	Automatically scales Kubernetes API server based on load. Larger control plane component limits and API server/etcd instances.
Free tier	Limited resources with inflight requests limit of 50 mutating and 100 read-only calls. Recommended node limit of 10 nodes per cluster. Best for experimenting, learning, and simple testing. Not advised for production/critical workloads.

Azure Lab Services

The following limits are for the number of Azure Lab Services resources.

Per resource type

Grouping	Resource type	Limit
Per subscription	Labs	980
Per resource group	Labs	800
	Lab plans	800
Per lab	Schedules	250
	Virtual machines (VMs)	400

Per region - Lab plans and labs

Subscription type	Lab plan limits	Lab limits
Default	2	2
Pay As You Go	500	500
MPN	500	500
Azure In Open	500	500
Enterprise Agreement	500	500
MSDN	500	500
Sponsored	100	15
CSP	500	500
Azure Pass	100	25
Free Trial	100	15
Azure for Students	100	15

For more information about Azure Lab Services capacity limits, see Capacity limits in Azure Lab Services.

Contact support to request an increase your limit.

Azure Load Testing limits

For Azure Load Testing limits, see Service limits in Azure Load Testing.

Azure Machine Learning limits

The latest values for Azure Machine Learning Compute quotas can be found in the Azure Machine Learning quota page

Azure Maps limits

Note

Azure Maps Gen1 Price Tier Retirement

Gen1 pricing tier is now deprecated and will be retired on 9/15/26. Gen2 pricing tier replaces Gen1 (both S0 and S1) pricing tier. If your Azure Maps account has Gen1 pricing tier selected, you can switch to Gen2 pricing before it's retired, otherwise it will automatically be updated. For more information, see Manage the pricing tier of your Azure Maps account.

For Azure Maps queries per second limits, see Azure Maps QPS rate limits

The following table shows the cumulative data size limit for Azure Maps accounts in an Azure subscription. The Azure Maps Data service is available only at the Gen1 (S1) and Gen2 pricing tier.

Resource	Limit
Maximum storage per Azure subscription	1 GB
Maximum size per file upload	100 MB

Note

Azure Maps Data service Retirement

The Azure Maps Data service (both [v1] and [v2]) is now deprecated and will be retired on 9/16/24. The Azure Maps Data Registry service is replacing the Data service. For more information, see How to create data registry

Azure Managed Grafana limits

Limit	Description	Essential	Standard
Alert rules	Maximum number of alert rules that can be created.	Not supported	500 per instance
Dashboards	Maximum number of dashboards that can be created.	20 per instance	Unlimited
Data sources	Maximum number of datasources that can be created.	5 per instance	Unlimited
API keys	Maximum number of API keys that can be created.	2 per instance	100 per instance
Data query timeout	Maximum wait duration for the reception of data query response headers, before Grafana times out.	200 seconds	200 seconds
Data source query size	Maximum number of bytes that are read/accepted from responses of outgoing HTTP requests.	80 MB	80 MB
Render image or PDF report wait time	Maximum duration for an image or report PDF rendering request to complete before Grafana times out.	Not supported	220 seconds
Instance count	Maximum number of instances in a single subscription per Azure region.	1	50
Requests per IP	Maximum number of requests per IP per second.	90 requests per second	90 requests per second
Requests per HTTP host	Maximum number of requests per HTTP host per second. The HTTP host stands for the Host header in incoming HTTP requests, which can describe each unique host client.	45 requests per second	45 requests per second

Azure Monitor limits

For Azure Monitor limits, see Azure Monitor service limits.

Azure Data Factory limits

Azure Data Factory is a multitenant service that has the following default limits in place to make sure customer subscriptions are protected from each other's workloads. To raise the limits up to the maximum for your subscription, contact support.

Resource	Default limit	Maximum limit
Total number of entities, such as pipelines, data sets, triggers, linked services, Private Endpoints, and integration runtimes, within a data factory	5,000	5,000
Total CPU cores for Azure-SSIS Integration Runtimes under one subscription	64	Find out how to request a quota increase from support.
Concurrent pipeline runs per data factory that's shared among all pipelines in the factory	10,000	10,000
Concurrent External activity runs per subscription per Azure Integration Runtime region External activities are managed on integration runtime but execute on linked services, including Databricks, stored procedure, Web, and others. This limit doesn't apply to Self-hosted IR.	3,000	3,000
Concurrent Pipeline activity runs per subscription per Azure Integration Runtime region Pipeline activities execute on integration runtime, including Lookup, GetMetadata, and Delete. This limit doesn't apply to Self-hosted IR.	1,000	1,000
Concurrent authoring operations per subscription per Azure Integration Runtime region Including test connection, browse folder list and table list, preview data. This limit doesn't apply to Self-hosted IR.	200	200
Concurrent Data Integration Units1 consumption per subscription per Azure Integration Runtime region	Region group 12: 6,000 Region group 22: 3,000 Region group 32: 1,500	Region group 12: 6,000 Region group 22: 3,000 Region group 32: 1,500
Concurrent Data Integration Units1 consumption per subscription per Azure Integration Runtime region in managed virtual network	2,400	2,400
Maximum activities per pipeline, which includes inner activities for containers	80	120
Maximum number of linked integration runtimes that can be created against a single self-hosted integration runtime	100	100
Maximum number of nodes that can be created against a single self-hosted integration runtime	4	4
Maximum parameters per pipeline	50	50
ForEach items	100,000	100,000
ForEach parallelism	20	50
Maximum queued runs per pipeline	100	100
Characters per expression	8,192	8,192
Minimum tumbling window trigger interval	5 min	15 min
Minimum timeout for pipeline activity runs	10 min	10 min
Maximum timeout for pipeline activity runs	7 days	7 days
Bytes per object for pipeline objects3	200 KB	200 KB
Bytes per object for dataset and linked service objects3	100 KB	2,000 KB
Bytes per payload for each activity run4	896 KB	896 KB
Data Integration Units1 per copy activity run	256	256
Write API calls	1,200/h	1,200/h This limit is imposed by Azure Resource Manager, not Azure Data Factory.
Read API calls	12,500/h	12,500/h This limit is imposed by Azure Resource Manager, not Azure Data Factory.
Monitoring queries per minute	1,000	1,000
Maximum time of data flow debug session	8 hrs	8 hrs
Concurrent number of data flows per integration runtime	50	50
Concurrent number of data flows per integration runtime in managed vNet	50	50
Concurrent number of data flow debug sessions per user per factory	3	3
Data Flow Azure IR TTL limit	4 hrs	4 hrs
Meta Data Entity Size limit in a factory	2 GB	2 GB

¹ The data integration unit (DIU) is used in a cloud-to-cloud copy operation. Learn more from Data integration units (version 2). For information on billing, see Azure Data Factory pricing.

² Azure Integration Runtime is globally available to ensure data compliance, efficiency, and reduced network egress costs.

Region group	Regions
Region group 1	Central US, East US, East US 2, North Europe, West Europe, West US, West US 2
Region group 2	Australia East, Australia Southeast, Brazil South, Central India, Japan East, North Central US, South Central US, Southeast Asia, West Central US
Region group 3	Other regions

If managed virtual network is enabled, the data integration unit (DIU) in all region groups are 2,400.

³ Pipeline, data set, and linked service objects represent a logical grouping of your workload. Limits for these objects don't relate to the amount of data you can move and process with Azure Data Factory. Data Factory is designed to scale to handle petabytes of data.

⁴ The payload for each activity run includes the activity configuration, the associated dataset(s) and linked service(s) configurations if any, and a small portion of system properties generated per activity type. Limit for this payload size doesn't relate to the amount of data you can move and process with Azure Data Factory. Learn about the symptoms and recommendation if you hit this limit.

Web service call limits

Azure Resource Manager has limits for API calls. You can make API calls at a rate within the Azure Resource Manager API limits.

Azure NetApp Files

Azure NetApp Files has a regional limit for capacity. The standard capacity limit for each subscription is 25 TiB, per region, across all service levels. To increase the capacity, use the Service and subscription limits (quotas) support request.

To learn more about the limits for Azure NetApp Files, see Resource limits for Azure NetApp Files.

Azure Policy limits

There's a maximum count for each object type for Azure Policy. For definitions, an entry of Scope means the management group or subscription. For assignments and exemptions, an entry of Scope means the management group, subscription, resource group, or individual resource.

Where	What	Maximum count
Scope	Policy definitions	500
Scope	Initiative definitions	200
Tenant	Initiative definitions	2,500
Scope	Policy or initiative assignments	200
Scope	Exemptions	1000
Policy definition	Parameters	20
Initiative definition	Policies	1000
Initiative definition	Parameters	400
Policy or initiative assignments	Exclusions (notScopes)	400
Policy rule	Nested conditionals	512
Remediation task	Resources	50,000
Policy definition, initiative, or assignment request body	Bytes	1,048,576

Policy rules have more limits to the number of conditions and their complexity. For more information, go to Policy rule limits for more details.

Azure Quantum limits

Provider Limits & Quota

The Azure Quantum Service supports both first and third-party service providers. Third-party providers own their limits and quotas. Users can view offers and limits in the Azure portal when configuring third-party providers.

You can find the published quota limits for Microsoft's first party Optimization Solutions provider below.

Learn & Develop SKU

Resource	Limit
CPU-based concurrent jobs	up to 51 concurrent jobs
FPGA-based concurrent jobs	up to 21 concurrent jobs
CPU-based solver hours	20 hours per month
FPGA-based solver hours	1 hour per month

While on the Learn & Develop SKU, you cannot request an increase on your quota limits. Instead you should switch to the Performance at Scale SKU.

Performance at Scale SKU

Resource	Default Limit	Maximum Limit
CPU-based concurrent jobs	up to 1001 concurrent jobs	same as default limit
FPGA-based concurrent jobs	up to 101 concurrent jobs	same as default limit
Solver hours	1,000 hours per month	up to 50,000 hours per month

Reach out to Azure Support to request a limit increase.

For more information, please review the Azure Quantum pricing page. Review the relevant provider pricing pages in the Azure portal for details on third-party offerings.

¹ Describes the number of jobs that can be queued at the same time.

Azure RBAC limits

The following limits apply to Azure role-based access control (Azure RBAC).

Area	Resource	Limit
Azure role assignments
	Azure role assignments per Azure subscription	4,000
	Azure role assignments per management group	500
	Size of description for Azure role assignments	2 KB
	Size of condition for Azure role assignments	8 KB
Azure custom roles
	Azure custom roles per tenant	5,000
	Azure custom roles per tenant (for Microsoft Azure operated by 21Vianet)	2,000
	Size of role name for Azure custom roles	512 chars
	Size of description for Azure custom roles	2 KB
	Number of assignable scopes for Azure custom roles	2,000

Azure SignalR Service limits

Resource	Default limit	Maximum limit
Azure SignalR Service units per instance for Free tier	1	1
Azure SignalR Service units per instance for Standard/Premium_P1 tier	100	100
Azure SignalR Service units per instance for Premium_P2 tier	100 - 1,000	100 - 1,000
Azure SignalR Service units per subscription per region for Free tier	5	5
Total Azure SignalR Service unit counts per subscription per region	150	Unlimited
Concurrent connections per unit for Free tier	20	20
Concurrent connections per unit for Standard/Premium tier	1,000	1,000
Included messages per unit per day for Free tier	20,000	20,000
Additional messages per unit per day for Free tier	0	0
Included messages per unit per day for Standard/Premium tier	1,000,000	1,000,000
Additional messages per unit per day for Standard/Premium tier	Unlimited	Unlimited

To request an update to your subscription's default limits, open a support ticket.

For more information about how connections and messages are counted, see Messages and connections in Azure SignalR Service.

If your requirements exceed the limits, switch from Free tier to Standard tier and add units. For more information, see How to scale an Azure SignalR Service instance?.

If your requirements exceed the limits of a single instance, add instances. For more information, see How to enable Geo-Replication in Azure SignalR Service.

Azure Spring Apps limits

To learn more about the limits for Azure Spring Apps, see Quotas and service plans for Azure Spring Apps.

Azure Storage limits

This section lists the following limits for Azure Storage:

• Standard storage account limits
• Azure Storage resource provider limits
• Azure Blob Storage limits
• Azure Queue storage limits
• Azure Table storage limits

Standard storage account limits

The following table describes default limits for Azure general-purpose v2 (GPv2), general-purpose v1 (GPv1), and Blob storage accounts. The ingress limit refers to all data that is sent to a storage account. The egress limit refers to all data that is received from a storage account.

Microsoft recommends that you use a GPv2 storage account for most scenarios. You can easily upgrade a GPv1 or a Blob storage account to a GPv2 account with no downtime and without the need to copy data. For more information, see Upgrade to a GPv2 storage account.

Note

You can request higher capacity and ingress limits. To request an increase, contact Azure Support.

Resource	Limit
Maximum number of storage accounts with standard endpoints per region per subscription, including standard and premium storage accounts.	250 by default, 500 by request1
Maximum number of storage accounts with Azure DNS zone endpoints (preview) per region per subscription, including standard and premium storage accounts.	5000 (preview)
Default maximum storage account capacity	5 PiB 2
Maximum number of blob containers, blobs, directories and subdirectories (if Hierarchical Namespace is enabled), file shares, tables, queues, entities, or messages per storage account.	No limit
Default maximum request rate per general-purpose v2 and Blob storage account in the following regions: East Asia Southeast Asia Australia East Brazil South Canada Central China East 2 China North 3 North Europe West Europe France Central Germany West Central Central India Japan East Jio India West Korea Central Norway East South Africa North Sweden Central UAE North UK South Central US East US East US 2 USGov Virginia USGov Arizona North Central US South Central US West US West US 2 West US 3	40,000 requests per second2
Default maximum request rate per general-purpose v2 and Blob storage account in regions that aren't listed in the previous row.	20,000 requests per second2
Default maximum ingress per general-purpose v2 and Blob storage account in the following regions: East Asia Southeast Asia Australia East Brazil South Canada Central China East 2 China North 3 North Europe West Europe France Central Germany West Central Central India Japan East Jio India West Korea Central Norway East South Africa North Sweden Central UAE North UK South Central US East US East US 2 USGov Virginia USGov Arizona North Central US South Central US West US West US 2 West US 3	60 Gbps2
Default maximum ingress per general-purpose v2 and Blob storage account in regions that aren't listed in the previous row.	25 Gbps2
Default maximum ingress for general-purpose v1 storage accounts (all regions)	10 Gbps2
Default maximum egress for general-purpose v2 and Blob storage accounts in the following regions: East Asia Southeast Asia Australia East Brazil South Canada Central China East 2 China North 3 North Europe West Europe France Central Germany West Central Central India Japan East Jio India West Korea Central Norway East South Africa North Sweden Central UAE North UK South Central US East US East US 2 USGov Virginia USGov Arizona North Central US South Central US West US West US 2 West US 3	200 Gbps2
Default maximum egress for general-purpose v2 and Blob storage accounts in regions that aren't listed in the previous row.	50 Gbps2
Maximum egress for general-purpose v1 storage accounts (US regions)	20 Gbps if RA-GRS/GRS is enabled, 30 Gbps for LRS/ZRS
Maximum egress for general-purpose v1 storage accounts (non-US regions)	10 Gbps if RA-GRS/GRS is enabled, 15 Gbps for LRS/ZRS
Maximum number of IP address rules per storage account	400
Maximum number of virtual network rules per storage account	400
Maximum number of resource instance rules per storage account	200
Maximum number of private endpoints per storage account	200

¹ With a quota increase, you can create up to 500 storage accounts with standard endpoints per region. For more information, see Increase Azure Storage account quotas.
² Azure Storage standard accounts support higher capacity limits and higher limits for ingress and egress by request. To request an increase in account limits, contact Azure Support.

Azure Storage resource provider limits

The following limits apply only when you perform management operations by using Azure Resource Manager with Azure Storage. The limits apply per region of the resource in the request.

Resource	Limit
Storage account management operations (read)	800 per 5 minutes
Storage account management operations (write)	10 per second / 1200 per hour
Storage account management operations (list)	100 per 5 minutes

Azure Blob Storage limits

Resource	Target
Maximum size of single blob container	Same as maximum storage account capacity
Maximum number of blocks in a block blob or append blob	50,000 blocks
Maximum size of a block in a block blob	4000 MiB
Maximum size of a block blob	50,000 X 4000 MiB (approximately 190.7 TiB)
Maximum size of a block in an append blob	4 MiB
Maximum size of an append blob	50,000 x 4 MiB (approximately 195 GiB)
Maximum size of a page blob	8 TiB2
Maximum number of stored access policies per blob container	5
Target request rate for a single blob	Up to 500 requests per second
Target throughput for a single page blob	Up to 60 MiB per second2
Target throughput for a single block blob	Up to storage account ingress/egress limits1

¹ Throughput for a single blob depends on several factors. These factors include but aren't limited to: concurrency, request size, performance tier, speed of source for uploads, and destination for downloads. To take advantage of the performance enhancements of high-throughput block blobs, upload larger blobs or blocks. Specifically, call the Put Blob or Put Block operation with a blob or block size that is greater than 256 KiB.

² Page blobs aren't yet supported in accounts that have a hierarchical namespace enabled.

The following table describes the maximum block and blob sizes permitted by service version.

Service version	Maximum block size (via Put Block)	Maximum blob size (via Put Block List)	Maximum blob size via single write operation (via Put Blob)
Version 2019-12-12 and later	4000 MiB	Approximately 190.7 TiB (4000 MiB X 50,000 blocks)	5000 MiB
Version 2016-05-31 through version 2019-07-07	100 MiB	Approximately 4.75 TiB (100 MiB X 50,000 blocks)	256 MiB
Versions prior to 2016-05-31	4 MiB	Approximately 195 GiB (4 MiB X 50,000 blocks)	64 MiB

Azure Queue storage limits

Resource	Target
Maximum size of a single queue	500 TiB
Maximum size of a message in a queue	64 KiB
Maximum number of stored access policies per queue	5
Maximum request rate per storage account	20,000 messages per second, which assumes a 1-KiB message size
Target throughput for a single queue (1-KiB messages)	Up to 2,000 messages per second

Azure Table storage limits

The following table describes capacity, scalability, and performance targets for Table storage.

Resource	Target
Number of tables in an Azure storage account	Limited only by the capacity of the storage account
Number of partitions in a table	Limited only by the capacity of the storage account
Number of entities in a partition	Limited only by the capacity of the storage account
Maximum size of a single table	500 TiB
Maximum size of a single entity, including all property values	1 MiB
Maximum number of properties in a table entity	255 (including the three system properties, PartitionKey, RowKey, and Timestamp)
Maximum total size of an individual property in an entity	Varies by property type. For more information, see Property Types in Understanding the Table Service Data Model.
Size of the PartitionKey	A string up to 1024 characters in size
Size of the RowKey	A string up to 1024 characters in size
Size of an entity group transaction	A transaction can include at most 100 entities and the payload must be less than 4 MiB in size. An entity group transaction can include an update to an entity only once.
Maximum number of stored access policies per table	5
Maximum request rate per storage account	20,000 transactions per second, which assumes a 1-KiB entity size
Target throughput for a single table partition (1 KiB-entities)	Up to 2,000 entities per second

Azure subscription creation limits

To learn more about the creation limits for Azure subscriptions, see Billing accounts and scopes in the Azure portal.

Azure Virtual Desktop Service limits

The following table describes the maximum limits for Azure Virtual Desktop.

Azure Virtual Desktop Object	Per Parent Container Object	Service Limit
Workspace	Microsoft Entra tenant	1300
HostPool	Workspace	400
Application group	Microsoft Entra tenant	5001
RemoteApp	Application group	500
Role Assignment	Any Azure Virtual Desktop Object	200
Session Host	HostPool	10,000

¹If you require over 500 Application groups then please raise a support ticket via the Azure portal.

All other Azure resources used in Azure Virtual Desktop such as Virtual Machines, Storage, Networking etc. are all subject to their own resource limitations documented in the relevant sections of this article. To visualise the relationship between all the Azure Virtual Desktop objects, review this article Relationships between Azure Virtual Desktop logical components.

To get started with Azure Virtual Desktop, use the getting started guide. For deeper architectural content for Azure Virtual Desktop, use the Azure Virtual Desktop section of the Cloud Adoption Framework. For pricing information for Azure Virtual Desktop, add "Azure Virtual Desktop" within the Compute section of the Azure Pricing Calculator.

Azure VMware Solution limits

The following table describes the maximum limits for Azure VMware Solution.

Resource	Limit
vSphere clusters per private cloud	12
Minimum number of ESXi hosts per cluster	3 (hard-limit)
Maximum number of ESXi hosts per cluster	16 (hard-limit)
Maximum number of ESXi hosts per private cloud	96
Maximum number of vCenter Servers per private cloud	1 (hard-limit)
Maximum number of HCX site pairings	25 (any edition)
Maximum number of HCX service meshes	10 (any edition)
Maximum number of Azure VMware Solution ExpressRoute linked private clouds from a single location to a single Virtual Network Gateway	4 The virtual network gateway used determines the actual max linked private clouds. For more information, see About ExpressRoute virtual network gateways If you exceed this threshold use Azure VMware Solution Interconnect to aggregate private cloud connectivity within the Azure region.
Maximum Azure VMware Solution ExpressRoute throughput	10 Gbps (use Ultra Performance Gateway SKU with FastPath enabled)** The virtual network gateway used determines the actual bandwidth. For more information, see About ExpressRoute virtual network gateways Azure VMware Solution ExpressRoutes do not have any port speed limitations and will perform above 10 Gbps; however, rates over 10 Gbps are not guaranteed due to QoS.
Maximum number of Azure Public IPv4 addresses assigned to NSX	2,000
Maximum number of Azure VMware Solution Interconnects per private cloud	10
Maximum number of Azure ExpressRoute Global Reach connections per Azure VMware Solution private cloud	8
vSAN capacity limits	75% of total usable (keep 25% available for SLA)
VMware Site Recovery Manager - Maximum number of protected Virtual Machines	3,000
VMware Site Recovery Manager - Maximum number of Virtual Machines per recovery plan	2,000
VMware Site Recovery Manager - Maximum number of protection groups per recovery plan	250
VMware Site Recovery Manager - RPO Values	5 min or higher * (hard-limit)
VMware Site Recovery Manager - Maximum number of virtual machines per protection group	500
VMware Site Recovery Manager - Maximum number of recovery plans	250

* For information about Recovery Point Objective (RPO) lower than 15 minutes, see How the 5 Minute Recovery Point Objective Works in the vSphere Replication Administration guide.

** This is the soft and recommended limit but can support higher throughput based on the scenario.

For other VMware-specific limits, use the VMware by Broadcom configuration maximum tool.

Azure Web PubSub limits

Resource	Default limit	Maximum limit
Azure Web PubSub Service units per instance for Free tier	1	1
Azure Web PubSub Service units per instance for Standard/Premium_P1 tier	100	100
Azure Web PubSub Service units per instance for Premium_P2 tier	100 - 1,000	100 - 1,000
Azure Web PubSub Service units per subscription per region for Free tier	5	5
Total Azure Web PubSub Service unit counts per subscription per region	150	Unlimited
Concurrent connections per unit for Free tier	20	20
Concurrent connections per unit for Standard/Premium tier	1,000	1,000
Included messages per unit per day for Free tier	20,000	20,000
Additional messages per unit per day for Free tier	0	0
Included messages per unit per day for Standard/Premium tier	1,000,000	1,000,000
Additional messages per unit per day for Standard/Premium tier	Unlimited	Unlimited

To request an update to your subscription's default limits, open a support ticket.

For more information about how connections and messages are counted in billing, see Billing model in Azure Web PubSub Service.

If your requirements exceed the limits, scale up from Free tier to Standard/Premium tier or scale out units. For more information, see How to scale an Azure Web PubSub Service instance.

If your requirements exceed the limits of a single instance, add instances. For more information, see How to use Geo-Replication in Azure Web PubSub.

Backup limits

For a summary of Azure Backup support settings and limitations, see Azure Backup Support Matrices.

Batch limits

Resource	Default limit	Maximum limit
Azure Batch accounts per region per subscription	1-3	50
Dedicated cores per Batch account	0-9001	Contact support
Low-priority cores per Batch account	0-1001	Contact support
Active jobs and job schedules per Batch account (completed jobs have no limit)	100-300	1,0002
Pools per Batch account	0-1001	5002
Private endpoint connections per Batch account	100	100

¹ For capacity management purposes, the default quotas for new Batch accounts in some regions and for some subscription types have been reduced from the above range of values. In some cases, these limits have been reduced to zero. When you create a new Batch account, check your quotas and request an appropriate core or service quota increase, if necessary. Alternatively, consider reusing Batch accounts that already have sufficient quota or user subscription pool allocation Batch accounts to maintain core and VM family quota across all Batch accounts on the subscription. Service quotas like active jobs or pools apply to each distinct Batch account even for user subscription pool allocation Batch accounts.

² To request an increase beyond this limit, contact Azure Support.

Note

Default limits vary depending on the type of subscription you use to create a Batch account. Cores quotas shown are for Batch accounts in Batch service mode. View the quotas in your Batch account.

Classic deployment model limits

If you use classic deployment model instead of the Azure Resource Manager deployment model, the following limits apply.

Resource	Default limit	Maximum limit
vCPUs per subscription1	20	10,000
Coadministrators per subscription	200	200
Storage accounts per subscription2	100	100
Cloud services per subscription	20	200
Local networks per subscription	10	500
DNS servers per subscription	9	100
Reserved IPs per subscription	20	100
Affinity groups per subscription	256	256
Subscription name length (characters)	64	64

¹Extra small instances count as one vCPU toward the vCPU limit despite using a partial CPU core.

²The storage account limit includes both Standard and Premium storage accounts.

Container Instances limits

Resource	Actual Limit
Standard sku container groups per region per subscription	100
Dedicated sku container groups per region per subscription	01
Number of containers per container group	60
Number of volumes per container group	20
Standard sku cores (CPUs) per region per subscription	100
Standard sku cores (CPUs) for K80 GPU per region per subscription	0
Standard sku cores (CPUs) for V100 GPU per region per subscription	0
Ports per IP	5
Container instance log size - running instance	4 MB
Container instance log size - stopped instance	16 KB or 1,000 lines
Container group creates per hour	3001
Container group creates per 5 minutes	1001
Container group deletes per hour	3001
Container group deletes per 5 minutes	1001

¹To request a limit increase, create an Azure Support request. Free subscriptions including Azure Free Account and Azure for Students aren't eligible for limit or quota increases. If you have a free subscription, you can upgrade to a Pay-As-You-Go subscription.
²Default limit for Pay-As-You-Go subscription. Limit may differ for other category types.

Container Registry limits

The following table details the features and limits of the Basic, Standard, and Premium service tiers.

Resource	Basic	Standard	Premium
Included storage1 (GiB)	10	100	500
Storage limit (TiB)	40	40	40
Maximum image layer size (GiB)	200	200	200
Maximum manifest size (MiB)	4	4	4
ReadOps per minute2, 3	1,000	3,000	10,000
WriteOps per minute2, 4	100	500	2,000
Download bandwidth2 (Mbps)	30	60	100
Upload bandwidth 2 (Mbps)	10	20	50
Webhooks	2	10	500
Geo-replication	N/A	N/A	Supported
Availability zones	N/A	N/A	Supported
Content trust	N/A	N/A	Supported
Private link with private endpoints	N/A	N/A	Supported
• Private endpoints	N/A	N/A	200
Public IP network rules	N/A	N/A	100
Service endpoint VNet access	N/A	N/A	Preview
• Virtual network rules	N/A	N/A	100
Customer-managed keys	N/A	N/A	Supported
Repository-scoped permissions	Supported	Supported	Supported
• Tokens	100	500	50,000
• Scope maps	100	500	50,000
• Actions	500	500	500
• Repositories per scope map5	500	500	500
Anonymous pull access	N/A	Preview	Preview

¹ Storage included in the daily rate for each tier. Additional storage may be used, up to the registry storage limit, at an additional daily rate per GiB. For rate information, see Azure Container Registry pricing. If you need storage beyond the registry storage limit, please contact Azure Support.

²ReadOps, WriteOps, and Bandwidth are minimum estimates. Azure Container Registry strives to improve performance as usage requires. Both resources, ACR, and the device must be in the same region to achieve a fast download speed.

³A docker pull translates to multiple read operations based on the number of layers in the image, plus the manifest retrieval.

⁴A docker push translates to multiple write operations, based on the number of layers that must be pushed. A docker push includes ReadOps to retrieve a manifest for an existing image.

⁵ Individual actions of content/delete, content/read, content/write, metadata/read, metadata/write corresponds to the limit of Repositories per scope map.

Content Delivery Network limits

Resource	Limit
Azure Content Delivery Network profiles	25
Content Delivery Network endpoints per profile	25
Custom domains per endpoint	25
Maximum origin group per profile	10
Maximum origin per origin group	10
Maximum number of rules per CDN endpoint	25
Maximum number of match conditions per rule	10
Maximum number of actions per rule	5
Maximum bandwidth per profile*	75 Gbps
Maximum requests per second per profile	100,000
HTTP header size limit (per header)	32 KB

*These two limits are only applicable to Azure CDN Standard from Microsoft (classic). If the traffic is not globally distributed and concentrated in one or two regions, or if a higher quota limit is needed, create an Azure Support request.

A Content Delivery Network subscription can contain one or more Content Delivery Network profiles. A Content Delivery Network profile can contain one or more Content Delivery Network endpoints. You might want to use multiple profiles to organize your Content Delivery Network endpoints by internet domain, web application, or some other criteria.

Data Lake Analytics limits

Azure Data Lake Analytics makes the complex task of managing distributed infrastructure and complex code easy. It dynamically provisions resources, and you can use it to do analytics on exabytes of data. When the job completes, it winds down resources automatically. You pay only for the processing power that was used. As you increase or decrease the size of data stored or the amount of compute used, you don't have to rewrite code. To raise the default limits for your subscription, contact support.

Resource	Limit	Comments
Maximum number of concurrent jobs	20
Maximum number of analytics units (AUs) per account	250	Use any combination of up to a maximum of 250 AUs across 20 jobs. To increase this limit, contact Microsoft Support.
Maximum script size for job submission	3 MB
Maximum number of Data Lake Analytics accounts per region per subscription	5	To increase this limit, contact Microsoft Support.

Data Factory limits

Azure Data Factory is a multitenant service that has the following default limits in place to make sure customer subscriptions are protected from each other's workloads. To raise the limits up to the maximum for your subscription, contact support.

Resource	Default limit	Maximum limit
Total number of entities, such as pipelines, data sets, triggers, linked services, Private Endpoints, and integration runtimes, within a data factory	5,000	5,000
Total CPU cores for Azure-SSIS Integration Runtimes under one subscription	64	Find out how to request a quota increase from support.
Concurrent pipeline runs per data factory that's shared among all pipelines in the factory	10,000	10,000
Concurrent External activity runs per subscription per Azure Integration Runtime region External activities are managed on integration runtime but execute on linked services, including Databricks, stored procedure, Web, and others. This limit doesn't apply to Self-hosted IR.	3,000	3,000
Concurrent Pipeline activity runs per subscription per Azure Integration Runtime region Pipeline activities execute on integration runtime, including Lookup, GetMetadata, and Delete. This limit doesn't apply to Self-hosted IR.	1,000	1,000
Concurrent authoring operations per subscription per Azure Integration Runtime region Including test connection, browse folder list and table list, preview data. This limit doesn't apply to Self-hosted IR.	200	200
Concurrent Data Integration Units1 consumption per subscription per Azure Integration Runtime region	Region group 12: 6,000 Region group 22: 3,000 Region group 32: 1,500	Region group 12: 6,000 Region group 22: 3,000 Region group 32: 1,500
Concurrent Data Integration Units1 consumption per subscription per Azure Integration Runtime region in managed virtual network	2,400	2,400
Maximum activities per pipeline, which includes inner activities for containers	80	120
Maximum number of linked integration runtimes that can be created against a single self-hosted integration runtime	100	100
Maximum number of nodes that can be created against a single self-hosted integration runtime	4	4
Maximum parameters per pipeline	50	50
ForEach items	100,000	100,000
ForEach parallelism	20	50
Maximum queued runs per pipeline	100	100
Characters per expression	8,192	8,192
Minimum tumbling window trigger interval	5 min	15 min
Minimum timeout for pipeline activity runs	10 min	10 min
Maximum timeout for pipeline activity runs	7 days	7 days
Bytes per object for pipeline objects3	200 KB	200 KB
Bytes per object for dataset and linked service objects3	100 KB	2,000 KB
Bytes per payload for each activity run4	896 KB	896 KB
Data Integration Units1 per copy activity run	256	256
Write API calls	1,200/h	1,200/h This limit is imposed by Azure Resource Manager, not Azure Data Factory.
Read API calls	12,500/h	12,500/h This limit is imposed by Azure Resource Manager, not Azure Data Factory.
Monitoring queries per minute	1,000	1,000
Maximum time of data flow debug session	8 hrs	8 hrs
Concurrent number of data flows per integration runtime	50	50
Concurrent number of data flows per integration runtime in managed vNet	50	50
Concurrent number of data flow debug sessions per user per factory	3	3
Data Flow Azure IR TTL limit	4 hrs	4 hrs
Meta Data Entity Size limit in a factory	2 GB	2 GB

¹ The data integration unit (DIU) is used in a cloud-to-cloud copy operation. Learn more from Data integration units (version 2). For information on billing, see Azure Data Factory pricing.

² Azure Integration Runtime is globally available to ensure data compliance, efficiency, and reduced network egress costs.

Region group	Regions
Region group 1	Central US, East US, East US 2, North Europe, West Europe, West US, West US 2
Region group 2	Australia East, Australia Southeast, Brazil South, Central India, Japan East, North Central US, South Central US, Southeast Asia, West Central US
Region group 3	Other regions

If managed virtual network is enabled, the data integration unit (DIU) in all region groups are 2,400.

³ Pipeline, data set, and linked service objects represent a logical grouping of your workload. Limits for these objects don't relate to the amount of data you can move and process with Azure Data Factory. Data Factory is designed to scale to handle petabytes of data.

⁴ The payload for each activity run includes the activity configuration, the associated dataset(s) and linked service(s) configurations if any, and a small portion of system properties generated per activity type. Limit for this payload size doesn't relate to the amount of data you can move and process with Azure Data Factory. Learn about the symptoms and recommendation if you hit this limit.

Web service call limits

Azure Resource Manager has limits for API calls. You can make API calls at a rate within the Azure Resource Manager API limits.

Data Lake Storage limits

Azure Data Lake Storage Gen2 is not a dedicated service or storage account type. It is the latest release of capabilities that are dedicated to big data analytics. These capabilities are available in a general-purpose v2 or BlockBlobStorage storage account, and you can obtain them by enabling the Hierarchical namespace feature of the account. For scale targets, see these articles.

• Scale targets for Blob storage.
• Scale targets for standard storage accounts.

Azure Data Lake Storage Gen1 is a dedicated service. It's an enterprise-wide hyper-scale repository for big data analytic workloads. You can use Data Lake Storage Gen1 to capture data of any size, type, and ingestion speed in one single place for operational and exploratory analytics. There's no limit to the amount of data you can store in a Data Lake Storage Gen1 account.

Resource	Limit	Comments
Maximum number of Data Lake Storage Gen1 accounts, per subscription, per region	10	To request an increase for this limit, contact support.
Maximum number of access ACLs, per file or folder	32	This is a hard limit. Use groups to manage access with fewer entries.
Maximum number of default ACLs, per file or folder	32	This is a hard limit. Use groups to manage access with fewer entries.

Data Share limits

Azure Data Share enables organizations to simply and securely share data with their customers and partners.

Resource	Limit
Maximum number of Data Share resources per Azure subscription	100
Maximum number of sent shares per Data Share resource	200
Maximum number of received shares per Data Share resource	100
Maximum number of invitations per sent share	200
Maximum number of share subscriptions per sent share	200
Maximum number of datasets per share	200
Maximum number of snapshot schedules per share	1

Database Migration Service Limits

Azure Database Migration Service is a fully managed service designed to enable seamless migrations from multiple database sources to Azure data platforms with minimal downtime.

Resource	Limit	Comments
Maximum number of services per subscription, per region	10	To request an increase for this limit, contact support.

Device Update for IoT Hub limits

Note

When a given resource or operation doesn't have adjustable limits, the default and the maximum limits are the same. When the limit can be adjusted, the following table includes both the default limit and maximum limit. The limit can be raised above the default limit but not above the maximum limit. Limits can only be adjusted for the Standard SKU. Limit adjustment requests are not accepted for Free SKU. Limit adjustment requests are evaluated on a case-by-case basis and approvals are not guaranteed. Additionally, Free SKU instances cannot be upgraded to Standard SKU instances.

If you want to raise the limit or quota above the default limit, open an online customer support request.

This table provides the limits for the Device Update for IoT Hub resource in Azure Resource Manager:

Resource	Standard SKU Limit	Free SKU Limit	Adjustable for Standard SKU?
Accounts per subscription	50	1	No
Instances per account	50	1	No
Length of account name	3-24 characters	3-24 characters	No
Length of instance name	3-36 characters	3-36 characters	No

This table provides the various limits associated with the operations within Device Update for IoT Hub:

Operation	Standard SKU Limit	Free SKU Limit	Adjustable for Standard SKU?
Number of devices per instance	1 Million	10	Yes
Number of device groups per instance	100	10	Yes
Number of device classes per instance	80	10	Yes
Number of active deployments per instance	50 (includes 1 reserved deployment for Cancels)	5 (includes 1 reserved deployment for Cancels)	Yes
Number of total deployments per instance (includes all active, inactive and cancelled deployments that are not deleted)	100	20	No
Number of update providers per instance	25	2	No
Number of update names per provider per instance	25	2	No
Number of update versions per update provider and name per instance	100	5	No
Total number of updates per instance	100	10	No
Maximum single update file size	2 GB	2 GB	Yes
Maximum combined size of all files in a single import action	2 GB	2 GB	Yes
Maximum number of files in a single update	10	10	No
Total data storage included per instance	100 GB	5 GB	No

Note

Cancelled or Inactive deployments count towards your total deployment limit. Please ensure that these deployments are periodically cleaned up, so that you are not prevented from creating new deployments.

Digital Twins limits

Note

Some areas of this service have adjustable limits, and others do not. This is represented in the following tables with the Adjustable? column. When the limit can be adjusted, the Adjustable? value is Yes.

Functional limits

The following table lists the functional limits of Azure Digital Twins.

Area	Capability	Default limit	Adjustable?
Azure resource	Number of Azure Digital Twins instances in a region, per subscription	10	Yes
Digital twins	Number of twins in an Azure Digital Twins instance	2,000,000	Yes
Digital twins	Number of digital twins that can be imported in a single Import Jobs API job	2,000,000	No
Digital twins	Number of incoming relationships to a single twin	50,000	No
Digital twins	Number of outgoing relationships from a single twin	50,000	No
Digital twins	Total number of relationships in an Azure Digital Twins instance	20,000,000	Yes
Digital twins	Number of relationships that can be imported in a single Import Jobs API job	10,000,000	No
Digital twins	Maximum size (of JSON body in a PUT or PATCH request) of a single twin	32 KB	No
Digital twins	Maximum request payload size	32 KB	No
Digital twins	Maximum size of a string property value (UTF-8)	4 KB	No
Digital twins	Maximum size of a property name	1 KB	No
Routing	Number of endpoints for a single Azure Digital Twins instance	6	No
Routing	Number of routes for a single Azure Digital Twins instance	6	Yes
Models	Number of models within a single Azure Digital Twins instance	10,000	Yes
Models	Number of models that can be imported in a single API call (not using the Import Jobs API)	250	No
Models	Number of models that can be imported in a single Import Jobs API job	10,000	No
Models	Maximum size (of JSON body in a PUT or PATCH request) of a single model	1 MB	No
Models	Number of items returned in a single page	100	No
Query	Number of items returned in a single page	1000	Yes
Query	Number of AND / OR expressions in a query	50	Yes
Query	Number of array items in an IN / NOT IN clause	50	Yes
Query	Number of characters in a query	8,000	Yes
Query	Number of JOINS in a query	5	Yes

Rate limits

The following table reflects the rate limits of different APIs.

API	Capability	Default limit	Adjustable?
Jobs API	Number of requests per second	1	Yes
Jobs API	Number of bulk jobs running concurrently (including import and delete)	1	Yes
Models API	Number of requests per second	100	Yes
Digital Twins API	Number of read requests per second	1,000	Yes
Digital Twins API	Number of patch requests per second	1,000	Yes
Digital Twins API	Number of create/delete operations per second across all twins and relationships	500	Yes
Digital Twins API	Number of create/update/delete operations per second on a single twin or its incoming/outgoing relationships	10	No
Digital Twins API	Number of outstanding operations on a single twin or its incoming/outgoing relationships	500	No
Query API	Number of requests per second	500	Yes
Query API	Query Units per second	4,000	Yes
Event Routes API	Number of requests per second	100	Yes

Other limits

Limits on data types and fields within DTDL documents for Azure Digital Twins models can be found within its spec documentation in GitHub: Digital Twins Definition Language (DTDL) - version 2.

Query latency details are described in Query language. Limitations of particular query language features can be found in the query reference documentation.

Event Grid limits

Note

The following limits listed in this article are per region.

Event Grid throttle limits

Event Grid offers a standard tier and basic tier. Event Grid standard tier enables pub-sub using Message Queuing Telemetry Transport (MQTT) broker functionality and pull-delivery of messages through the Event Grid namespace. Event Grid basic tier enables push delivery using Event Grid custom topics, Event Grid system topics, Event domains, and Event Grid partner topics. See Choose the right Event Grid tier. This article describes the quota and limits for both tiers.

Event Grid Namespace resource limits

Azure Event Grid namespaces enables MQTT messaging, and HTTP pull delivery. The following limits apply to namespace resources in Azure Event Grid.

Limit description	Limit
Event Grid namespaces per Azure subscription	50
Maximum throughput units per Event Grid namespace	40
IP Firewall rules per Event Grid namespace	16

MQTT limits in Event Grid namespace

The following limits apply to MQTT in Azure Event Grid namespace resource.

Note

Throughput units (TUs) define the ingress and egress event rate capacity in namespaces. They allow you to control the capacity of your namespace resource for message ingress and egress.

Limit description	Limit
MQTT sessions per Event Grid namespace	10,000 per throughput unit (TU)
Sessions per Event Grid namespace	10,000 per TU
Session Expiry Interval	8 hours, configurable on the Event Grid namespace
Inbound MQTT publishing requests per Event Grid namespace	1,000 messages per second per TU
Inbound MQTT bandwidth per Event Grid namespace	1 MB per second per TU
Inbound MQTT publishing requests per session	100 messages per second
Inbound MQTT bandwidth per session	1 MB per second
Inbound in-flight MQTT messages*	100 messages
Inbound in-flight MQTT bandwidth*	64 KB
Outbound MQTT publishing requests per Event Grid namespace	1,000 messages per second per TU
Outbound MQTT bandwidth per Event Grid namespace	1 MB per second per TU
Outbound MQTT publishing requests per session	100 messages per second
Outbound MQTT bandwidth per session	1 MB per second
Outbound in-flight MQTT messages*	100 messages
Outbound in-flight MQTT bandwidth*	64 KB
Max message size	512 KB
Segments per topic/ topic filter	8
Topic size	256 B
MQTTv5 response topic	256 B
MQTTv5 topic aliases	10 per session
MQTTv5 total size of all user properties	32 KB
MQTTv5 content type size	256 B
MQTTv5 correlation data size	256 B
Connect requests	200 requests per second per TU
MQTTv5 authentication data size	8 KB
Maximum keep-alive interval	1160
Topic filters per MQTT SUBSCRIBE packet	10
Subscribe and unsubscribe requests per Event Grid namespace	200 requests per second
Subscribe and unsubscribe requests per session	5 requests per second
Subscriptions per MQTT session	50
Subscriptions per Event Grid namespace	1 million
Subscriptions per MQTT topic	Unlimited, as long as they don't exceed the limit for subscriptions per Event Grid namespace or session
Registered client resources	10,000 clients per TU
CA certificates	10
Client groups	10
Topic spaces	10
Topic templates	10 per topic space
Permission bindings	100

* For MQTTv5, learn more about flow control support.

Events limits in Event Grid namespace

The following limits apply to events in Azure Event Grid namespace resource.

Limit description	Limit
Event Grid namespace topics	100 per TU
Event ingress	1,000 events per second or 1 MB per second per TU (whichever comes first)
Event egress (push and pull APIs)	Up to 2,000 events per second or 2 MB per second per TU
Event egress (acknowledge, release, reject, and renew lock APIs)	Up to 2,000 events per second or 2 MB per second per TU
Maximum event retention on Event Grid namespace topics	7 days
Subscriptions per topic	500
Maximum event size	1 MB
Batch size	1 MB
Events per request	1,000

Custom topic, system topic, and partner topic resource limits

The following limits apply to Azure Event Grid custom topic, system topic, and partner topic resources.

Limit description	Limit
Custom topics per Azure subscription	100 When the limit is reached, you can consider a different region or consider using domains, which can support 100,000 topics.
Event subscriptions per topic	500 This limit can’t be increased.
Publish rate for a custom or a partner topic (ingress)	5,000 events or 5 MB per second (whichever comes first). An event is counted for limits and pricing purposes as a 64KB data chunk. So, if the event is 128 KB, it counts as two events.
Event size	1 MB This limit can’t be increased.
Maximum event retention on topics	1 day. This limit can't be increased.
Number of incoming events per batch	5,000 This limit can’t be increased
Private endpoint connections per topic	64 This limit can’t be increased
IP Firewall rules per topic	128

Domain resource limits

The following limits apply to Azure Event Grid domain resource.

Limit description	Limit
Domains per Azure subscription	100
Topics per domain	100,000
Event subscriptions per topic within a domain	500 This limit can’t be increased
Domain scope event subscriptions	50 This limit can’t be increased
Publish rate for a domain (ingress)	5,000 events or 5 MB per second (whichever comes first). An event is counted for limits and pricing purposes as a 64KB data chunk. So, if the event is 128 KB, it counts as two events.
Maximum event retention on domain topics	1 day. This limit can't be increased.
Private endpoint connections per domain	64
IP Firewall rules per topic	128

Event Hubs limits

The following tables provide quotas and limits specific to Azure Event Hubs. For information about Event Hubs pricing, see Event Hubs pricing.

Common limits for all tiers

The following limits are common across all tiers.

Limit	Notes	Value
Size of an event hub name	-	256 characters
Size of a consumer group name	Kafka protocol doesn't require the creation of a consumer group.	Kafka: 256 characters AMQP: 50 characters
Number of non-epoch receivers per consumer group	-	5
Number of authorization rules per namespace	Subsequent requests for authorization rule creation are rejected.	12
Number of calls to the GetRuntimeInformation method	-	50 per second
Number of virtual networks (VNet)	-	128
Number of IP Config rules	-	128
Maximum length of a schema group name		50
Maximum length of a schema name		100
Size in bytes per schema		1 MB
Number of properties per schema group		1024
Size in bytes per schema group property key		256
Size in bytes per schema group property value		1024

Basic vs. standard vs. premium vs. dedicated tiers

The following table shows limits that are different for Basic, Standard, Premium, and Dedicated tiers.

Note

• In the table, CU is capacity unit, PU is processing unit, and TU is throughput unit.
• You can configure TUs for a Basic or Standard tier namespace or PUs for a Premium tier namespace.
• When you create a dedicated cluster, one CU is assigned to the cluster. If you enable the Support scaling option while you create the cluster, you can scale out by increasing CUs or scale in by decreasing CUs for the cluster yourself. For step-by-step instructions, see Scale dedicated cluster. For clusters that don't support the Support scaling feature, submit a ticket to adjust CUs for the cluster.

Limit	Basic	Standard	Premium	Dedicated
Maximum size of Event Hubs publication	256 KB	1 MB	1 MB	1 MB
Number of consumer groups per event hub	1	20	100	1,000 No limit per CU
Number of Kafka consumer groups per namespace	NA	1,000	1,000	1,000
Number of brokered connections per namespace	100	5,000	10,000 per PU For example, if the namespace is assigned 3 PUs, the limit is 30,000.	100,000 per CU
Maximum retention period of event data	1 day	7 days	90 days	90 days
Event storage for retention	84 GB per TU	84 GB per TU	1 TB per PU	10 TB per CU
Maximum TUs or PUs or CUs	40 TUs	40 TUs	16 PUs	20 CUs
Number of partitions per event hub	32	32	100 per event hub, but there's a limit of 200 per PU at the namespace level. For example, if a namespace is assigned 2 PUs, the limit for total number of partitions in all event hubs in the namespace is 2 * 200 = 400.	1,024 per event hub 2,000 per CU
Number of namespaces per subscription	1,000	1,000	1,000	1,000 (50 per CU)
Number of event hubs per namespace	10	10	100 per PU	1,000
Capture	N/A	Pay per hour	Included	Included
Size of compacted event hub	N/A	1 GB per partition	250 GB per partition	250 GB per partition
Size of the schema registry (namespace) in megabytes	N/A	25	100	1,024
Number of schema groups in a schema registry or namespace	N/A	1: excluding the default group	100 1 MB per schema	1,000 1 MB per schema
Number of schema versions across all schema groups	N/A	25	1,000	10,000
Throughput per unit	Ingress: 1 MB/sec or 1000 events per second Egress: 2 MB/sec or 4,096 events per second	Ingress: 1 MB/sec or 1,000 events per second Egress: 2 MB/sec or 4,096 events per second	No limits per PU *	No limits per CU *

* Depends on factors such as resource allocation, number of partitions, and storage.

Note

You can publish events individually or batched. The publication limit (according to SKU) applies regardless of whether it's a single event or a batch. Publishing events larger than the maximum threshold will be rejected.

IoT Central limits

IoT Central limits the number of applications you can deploy in a subscription to 100. To learn more, see Azure IoT Central quota and limits.

IoT Hub limits

The following table lists the limits associated with the different service tiers S1, S2, S3, and F1. For information about the cost of each unit in each tier, see Azure IoT Hub pricing.

Resource	S1 Standard	S2 Standard	S3 Standard	F1 Free
Messages/day	400,000	6,000,000	300,000,000	8,000
Maximum units	200	200	10	1

The following table lists the limits that apply to IoT Hub resources.

Resource	Limit
Maximum paid IoT hubs per Azure subscription	50
Maximum free IoT hubs per Azure subscription	1
Maximum number of characters in a device ID	128
Maximum number of device identities returned in a single call	1,000
IoT Hub message maximum retention for device-to-cloud messages	7 days
Maximum size of device-to-cloud message	256 KB
Maximum size of device-to-cloud batch	AMQP and HTTP: 256 KB for the entire batch MQTT: 256 KB for each message
Maximum messages in device-to-cloud batch	500
Maximum size of cloud-to-device message	64 KB
Maximum TTL for cloud-to-device messages	2 days
Maximum delivery count for cloud-to-device messages	100
Maximum cloud-to-device queue depth per device	50
Maximum delivery count for feedback messages in response to a cloud-to-device message	100
Maximum TTL for feedback messages in response to a cloud-to-device message	2 days
Maximum size of device twin	8 KB for tags section, and 32 KB for desired and reported properties sections each
Maximum length of device twin string key	1 KB
Maximum length of device twin string value	4 KB
Maximum depth of object in device twin	10
Maximum size of direct method payload	128 KB
Job history maximum retention	30 days
Maximum concurrent jobs	10 (for S3), 5 for (S2), 1 (for S1)
Maximum additional endpoints (beyond built-in endpoints)	10 (for S1, S2, and S3)
Maximum message routing rules	100 (for S1, S2, and S3)
Maximum number of concurrently connected device streams	50 (for S1, S2, S3, and F1 only)
Maximum device stream data transfer	300 MB per day (for S1, S2, S3, and F1 only)

Note

The total number of devices plus modules that can be registered to a single IoT hub is capped at 1,000,000.

IoT Hub throttles requests when the following quotas are exceeded.

Throttle	Per-hub value
Identity registry operations (create, retrieve, list, update, and delete), individual or bulk import/export	83.33/sec/unit (5,000/min/unit) (for S3). 1.67/sec/unit (100/min/unit) (for S1 and S2).
Device connections	6,000/sec/unit (for S3), 120/sec/unit (for S2), 12/sec/unit (for S1). Minimum of 100/sec.
Device-to-cloud sends	6,000/sec/unit (for S3), 120/sec/unit (for S2), 12/sec/unit (for S1). Minimum of 100/sec.
Cloud-to-device sends	83.33/sec/unit (5,000/min/unit) (for S3), 1.67/sec/unit (100/min/unit) (for S1 and S2).
Cloud-to-device receives	833.33/sec/unit (50,000/min/unit) (for S3), 16.67/sec/unit (1,000/min/unit) (for S1 and S2).
File upload operations	83.33 file upload initiations/sec/unit (5,000/min/unit) (for S3), 1.67 file upload initiations/sec/unit (100/min/unit) (for S1 and S2). 10 concurrent file uploads per device.
Direct methods	24 MB/sec/unit (for S3), 480 KB/sec/unit (for S2), 160 KB/sec/unit (for S1). Based on 8-KB throttling meter size.
Device twin reads	500/sec/unit (for S3), Maximum of 100/sec or 10/sec/unit (for S2), 100/sec (for S1)
Device twin updates	250/sec/unit (for S3), Maximum of 50/sec or 5/sec/unit (for S2), 50/sec (for S1)
Jobs operations (create, update, list, and delete)	83.33/sec/unit (5,000/min/unit) (for S3), 1.67/sec/unit (100/min/unit) (for S2), 1.67/sec/unit (100/min/unit) (for S1).
Jobs per-device operation throughput	50/sec/unit (for S3), maximum of 10/sec or 1/sec/unit (for S2), 10/sec (for S1).
Device stream initiation rate	5 new streams/sec (for S1, S2, S3, and F1 only).

IoT Hub Device Provisioning Service limits

The following table lists the limits that apply to Azure IoT Hub Device Provisioning Service resources.

Resource	Limit	Adjustable?
Maximum device provisioning services per Azure subscription	10	No
Maximum number of registrations	1,000,000	No
Maximum number of individual enrollments	1,000,000	No
Maximum number of enrollment groups (X.509 certificate)	100	No
Maximum number of enrollment groups (symmetric key)	100	No
Maximum number of CAs	25	No
Maximum number of linked IoT hubs	50	No
Maximum size of message	96 KB	No

Tip

If the hard limit on symmetric key enrollment groups is a blocking issue, it is recommended to use individual enrollments as a workaround.

The Device Provisioning Service has the following rate limits.

Rate	Per-unit value	Adjustable?
Operations	1,000/min/service	No
Device registrations	1,000/min/service	No
Device polling operation	5/10 sec/device	No

Key Vault limits

Azure Key Vault service supports two resource types: Vaults and Managed HSMs. The following two sections describe the service limits for each of them respectively.

Resource type: vault

This section describes service limits for resource type vaults.

Key transactions (maximum transactions allowed in 10 seconds, per vault per region¹):

Key type	HSM key CREATE key	HSM key All other transactions	Software key CREATE key	Software key All other transactions
RSA 2,048-bit	10	2,000	20	4,000
RSA 3,072-bit	10	500	20	1,000
RSA 4,096-bit	10	250	20	500
ECC P-256	10	2,000	20	4,000
ECC P-384	10	2,000	20	4,000
ECC P-521	10	2,000	20	4,000
ECC SECP256K1	10	2,000	20	4,000

Note

In the previous table, we see that for RSA 2,048-bit software keys, 4,000 GET transactions per 10 seconds are allowed. For RSA 2,048-bit HSM-keys, 2,000 GET transactions per 10 seconds are allowed.

The throttling thresholds are weighted, and enforcement is on their sum. For example, as shown in the previous table, when you perform GET operations on RSA HSM-keys, it's eight times more expensive to use 4,096-bit keys compared to 2,048-bit keys. That's because 2,000/250 = 8.

In a given 10-second interval, an Azure Key Vault client can do only one of the following operations before it encounters a 429 throttling HTTP status code:

• 4,000 RSA 2,048-bit software-key GET transactions
• 2,000 RSA 2,048-bit HSM-key GET transactions
• 250 RSA 4,096-bit HSM-key GET transactions
• 248 RSA 4,096-bit HSM-key GET transactions and 16 RSA 2,048-bit HSM-key GET transactions

Secrets, managed storage account keys, and vault transactions:

Transactions type	Maximum transactions allowed in 10 seconds, per vault per region1
Secret CREATE secret	300
All other transactions	4,000

For information on how to handle throttling when these limits are exceeded, see Azure Key Vault throttling guidance.

¹ A subscription-wide limit for all transaction types is five times per key vault limit.

Backup keys, secrets, certificates

When you back up a key vault object, such as a secret, key, or certificate, the backup operation will download the object as an encrypted blob. This blob cannot be decrypted outside of Azure. To get usable data from this blob, you must restore the blob into a key vault within the same Azure subscription and Azure geography

Transactions type	Maximum key vault object versions allowed
Back up individual key, secret, certificate	500

Note

Attempting to backup a key, secret, or certificate object with more versions than above limit will result in an error. It is not possible to delete previous versions of a key, secret, or certificate.

Limits on count of keys, secrets and certificates:

Key Vault does not restrict the number of keys, secrets or certificates that can be stored in a vault. The transaction limits on the vault should be taken into account to ensure that operations are not throttled.

Key Vault does not restrict the number of versions on a secret, key or certificate, but storing a large number of versions (500+) can impact the performance of backup operations. See Azure Key Vault Backup.

Resource type: Managed HSM

This section describes service limits for resource type managed HSM.

Object limits

Item	Limits
Number of HSM instances per subscription per region	5
Number of keys per HSM instance	5000
Number of versions per key	100
Number of custom role definitions per HSM instance	50
Number of role assignments at HSM scope	50
Number of role assignments at each individual key scope	10

Transaction limits for administrative operations (number of operations per second per HSM instance)

Operation	Number of operations per second
All RBAC operations (includes all CRUD operations for role definitions and role assignments)	5
Full HSM Backup/Restore (only one concurrent backup or restore operation per HSM instance supported)	1

Transaction limits for cryptographic operations (number of operations per second per HSM instance)

• Each Managed HSM instance constitutes three load balanced HSM partitions. The throughput limits are a function of underlying hardware capacity allocated for each partition. The tables below show maximum throughput with at least one partition available. Actual throughput may be up to 3x higher if all three partitions are available.
• Throughput limits noted assume that one single key is being used to achieve maximum throughput. For example, if a single RSA-2048 key is used the maximum throughput will be 1100 sign operations. If you use 1100 different keys with one transaction per second each, they will not be able to achieve the same throughput.

RSA key operations (number of operations per second per HSM instance)

Operation	2048-bit	3072-bit	4096-bit
Create Key	1	1	1
Delete Key (soft-delete)	10	10	10
Purge Key	10	10	10
Backup Key	10	10	10
Restore Key	10	10	10
Get Key Information	1100	1100	1100
Encrypt	10000	10000	6000
Decrypt	1100	360	160
Wrap	10000	10000	6000
Unwrap	1100	360	160
Sign	1100	360	160
Verify	10000	10000	6000

EC key operations (number of operations per second per HSM instance)

This table describes number of operations per second for each curve type.

Operation	P-256	P-256K	P-384	P-521
Create Key	1	1	1	1
Delete Key (soft-delete)	10	10	10	10
Purge Key	10	10	10	10
Backup Key	10	10	10	10
Restore Key	10	10	10	10
Get Key Information	1100	1100	1100	1100
Sign	260	260	165	56
Verify	130	130	82	28

AES key operations (number of operations per second per HSM instance)

• Encrypt and Decrypt operations assume a 4KB packet size.
• Throughput limits for Encrypt/Decrypt apply to AES-CBC and AES-GCM algorithms.
• Throughput limits for Wrap/Unwrap apply to AES-KW algorithm.

Operation	128-bit	192-bit	256-bit
Create Key	1	1	1
Delete Key (soft-delete)	10	10	10
Purge Key	10	10	10
Backup Key	10	10	10
Restore Key	10	10	10
Get Key Information	1100	1100	1100
Encrypt	8000	8000	8000
Decrypt	8000	8000	8000
Wrap	9000	9000	9000
Unwrap	9000	9000	9000

Managed identity limits

• Each managed identity counts towards the object quota limit in a Microsoft Entra tenant as described in Microsoft Entra service limits and restrictions.

• The rate at which managed identities can be created have the following limits:

  1. Per Microsoft Entra tenant per Azure region: 400 create operations per 20 seconds.
  2. Per Azure Subscription per Azure region : 80 create operations per 20 seconds.

• The rate at which a user-assigned managed identity can be assigned with an Azure resource :

  1. Per Microsoft Entra tenant per Azure region: 400 assignment operations per 20 seconds.
  2. Per Azure Subscription per Azure region : 300 assignment operations per 20 seconds.

Media Services limits

Note

For resources that aren't fixed, open a support ticket to ask for an increase in the quotas. Don't create additional Azure Media Services accounts in an attempt to obtain higher limits.

Account limits

Resource	Default Limit
Media Services accounts in a single subscription	100 (fixed)

Asset limits

Resource	Default Limit
Assets per Media Services account	1,000,000

Storage (media) limits

Resource	Default Limit
File size	In some scenarios, there is a limit on the maximum file size supported for processing in Media Services. (1)
Storage accounts	100(2) (fixed)

¹ The maximum size supported for a single blob is currently up to 5 TB in Azure Blob Storage. Additional limits apply in Media Services based on the VM sizes that are used by the service. The size limit applies to the files that you upload and also the files that get generated as a result of Media Services processing (encoding or analyzing). If your source file is larger than 260-GB, your Job will likely fail.

² The storage accounts must be from the same Azure subscription.

Jobs (encoding & analyzing) limits

Resource	Default Limit
Jobs per Media Services account	500,000 (3) (fixed)
Job inputs per Job	50 (fixed)
Job outputs per Job	20 (fixed)
Transforms per Media Services account	100 (fixed)
Transform outputs in a Transform	20 (fixed)
Files per job input	10 (fixed)

³ This number includes queued, finished, active, and canceled Jobs. It does not include deleted Jobs.

Any Job record in your account older than 90 days will be automatically deleted, even if the total number of records is below the maximum quota.

Live streaming limits

Resource	Default Limit
Live Events (4) per Media Services account	5
Live Outputs per Live Event	3 (5)
Max Live Output duration	Size of the DVR window

⁴ For detailed information about Live Event limitations, see Live Event types comparison and limitations.

⁵ Live Outputs start on creation and stop when deleted.

Packaging & delivery limits

Resource	Default Limit
Streaming Endpoints (stopped or running) per Media Services account	2
Dynamic Manifest Filters	100
Streaming Policies	100 (6)
Unique Streaming Locators associated with an Asset at one time	100(7) (fixed)

⁶ When using a custom Streaming Policy, you should design a limited set of such policies for your Media Service account, and re-use them for your StreamingLocators whenever the same encryption options and protocols are needed. You should not be creating a new Streaming Policy for each Streaming Locator.

⁷ Streaming Locators are not designed for managing per-user access control. To give different access rights to individual users, use Digital Rights Management (DRM) solutions.

Protection limits

Resource	Default Limit
Options per Content Key Policy	30
Licenses per month for each of the DRM types on Media Services key delivery service per account	1,000,000

Support ticket

For resources that are not fixed, you may ask for the quotas to be raised, by opening a support ticket. Include detailed information in the request on the desired quota changes, use-case scenarios, and regions required.
Do not create additional Azure Media Services accounts in an attempt to obtain higher limits.

Media Services v2 (legacy)

For limits specific to Media Services v2 (legacy), see [Media Services v2 (legacy)]

Mobile Services limits

Tier	Free	Basic	Standard
API calls	500,000	1.5 million per unit	15 million per unit
Active devices	500	Unlimited	Unlimited
Scale	N/A	Up to 6 units	Unlimited units
Push notifications	Azure Notification Hubs Free tier included, up to 1 million pushes	Notification Hubs Basic tier included, up to 10 million pushes	Notification Hubs Standard tier included, up to 10 million pushes
Real-time messaging/ WebSockets	Limited	350 per mobile service	Unlimited
Offline synchronizations	Limited	Included	Included
Scheduled jobs	Limited	Included	Included
Azure SQL Database (required) Standard rates apply for additional capacity	20 MB included	20 MB included	20 MB included
CPU capacity	60 minutes per day	Unlimited	Unlimited
Outbound data transfer	165 MB per day (daily rollover)	Included	Included

For more information on limits and pricing, see Azure Mobile Services pricing.

Multifactor authentication limits

Resource	Default limit	Maximum limit
Maximum number of trusted IP addresses or ranges per subscription	0	50
Remember my devices, number of days	14	60
Maximum number of app passwords	0	No limit
Allow X attempts during MFA call	1	99
Two-way text message timeout seconds	60	600
Default one-time bypass seconds	300	1,800
Lock user account after X consecutive MFA denials	Not set	99
Reset account lockout counter after X minutes	Not set	9,999
Unlock account after X minutes	Not set	9,999

Networking limits

Networking limits - Azure Resource Manager

The following limits apply only for networking resources managed through Azure Resource Manager per region per subscription. Learn how to view your current resource usage against your subscription limits.

Note

We have increased all default limits to their maximum limits. If there's no maximum limit column, the resource doesn't have adjustable limits. If you had these limits manually increased by support in the past and are currently seeing limits lower than what is listed in the following tables, open an online customer support request at no charge

Resource	Limit
Virtual networks	1,000
Subnets per virtual network	3,000
Virtual network peerings per virtual network	500
Virtual network gateways (VPN gateways) per virtual network	1
Virtual network gateways (ExpressRoute gateways) per virtual network	1
DNS servers per virtual network	20
Private IP addresses per virtual network	65,536
Total Private Addresses for a group of Peered Virtual networks	128,000
Private IP addresses per network interface	256
Private IP addresses per virtual machine	256
Public IP addresses per network interface	256
Public IP addresses per virtual machine	256
Concurrent TCP or UDP flows per NIC of a virtual machine or role instance	500,000
Network interface cards	65,536
Network Security Groups	5,000
NSG rules per NSG	1,000
IP addresses and ranges specified for source or destination in a security group (The limit applies separately to source and destination)	4,000
Application security groups	3,000
Application security groups per IP configuration, per NIC	20
Application security groups referenced as source/destination per NSG rule	10
IP configurations per application security group	4,000
Application security groups that can be specified within all security rules of a network security group	100
User-defined route tables	200
User-defined routes per route table	400
Point-to-site root certificates per Azure VPN Gateway	20
Point-to-site revoked client certificates per Azure VPN Gateway	300
Virtual network TAPs	100
Network interface TAP configurations per virtual network TAP	100

Public IP address limits

Resource	Default limit	Maximum limit
Public IP addresses1,2	10 for Basic	Contact support
Static Public IP addresses1	10 for Basic	Contact support
Standard Public IP addresses1	10	Contact support
Public IP prefixes	limited by number of Standard Public IPs in a subscription	Contact support
Public IP prefix length	/28	Contact support
Custom IP prefixes	5	Contact support

¹Default limits for Public IP addresses vary by offer category type, such as Free Trial, Pay-As-You-Go, CSP. For example, the default for Enterprise Agreement subscriptions is 1000.

²Public IP addresses limit refers to the total amount of Public IP addresses, including Basic and Standard.

The following limits apply only for networking resources managed through the classic deployment model per subscription. Learn how to view your current resource usage against your subscription limits.

Resource	Default limit	Maximum limit
Virtual networks	100	100
Local network sites	20	50
DNS servers per virtual network	20	20
Private IP addresses per virtual network	4,096	4,096
Concurrent TCP or UDP flows per NIC of a virtual machine or role instance	500,000, up to 1,000,000 for two or more NICs.	500,000, up to 1,000,000 for two or more NICs.
Network Security Groups (NSGs)	200	200
NSG rules per NSG	200	1,000
User-defined route tables	200	200
User-defined routes per route table	400	400
Public IP addresses (dynamic)	500	500
Reserved public IP addresses	500	500
Public IP per deployment	5	Contact support
Private IP (internal load balancing) per deployment	1	1
Endpoint access control lists (ACLs)	50	50

Azure Load Balancer limits

Standard Load Balancer

Resource	Limit
Load balancers	1,000
Frontend IP configurations	600
Rules (Load Balancer + Inbound NAT) per resource	1,500
Rules per NIC (across all IPs on a NIC)1	300
High-availability ports rule	1 per internal frontend
Outbound rules per Load Balancer	600
Backend pool size	5,000
Azure global Load Balancer Backend pool size	300
Backend IP configurations per frontend 2	10,000
Backend IP configurations across all frontends	500,000

^{1 Each NIC can have a total of 300 rules (load balancing, inbound NAT, and outbound rules combined) configured across all IP configurations on the NIC. 2 Backend IP configurations are aggregated across all load balancer rules including load balancing, inbound NAT, and outbound rules. Each rule a backend pool instance is configured to counts as one configuration.}

Load Balancer doesn't apply any throughput limits. However, throughput limits for virtual machines and virtual networks still apply. For more information, see Virtual machine network bandwidth.

Gateway Load Balancer

Resource	Limit
Resources chained per Load Balancer (LB frontend configurations or VM NIC IP configurations combined)	100

All limits for Standard Load Balancer also apply to Gateway Load Balancer.

Basic Load Balancer

Resource	Limit
Load balancers	1,000
Rules per resource	250
Rules per NIC (across all IPs on a NIC)	300
Frontend IP configurations 3	200
Backend pool size	300 IP configurations, single availability set
Availability sets per Load Balancer	1
Load Balancers per VM	2 (1 Public and 1 internal)

³ The limit for a single discrete resource in a backend pool (standalone virtual machine, availability set, or virtual machine scale-set placement group) is to have up to 250 Frontend IP configurations across a single Basic Public Load Balancer and Basic Internal Load Balancer.

Application Gateway limits

The following table applies to v1, v2, Standard, and WAF SKUs unless otherwise stated.

Resource	Limit	Note
Azure Application Gateway	1,000 per region per subscription
Frontend IP configurations	2	1 public and 1 private
Frontend ports	1001
Backend address pools	100
Backend targets per pool	1,200
HTTP listeners	2001	Limited to 100 active listeners that are routing traffic. Active listeners = total number of listeners - listeners not active. If a default configuration inside a routing rule is set to route traffic (for example, it has a listener, a backend pool, and HTTP settings) then that also counts as a listener. For more information, see Frequently asked questions about Application Gateway.
HTTP load-balancing rules	4001
Backend HTTP settings	1001
Instances per gateway	V1 SKU - 32 V2 SKU - 125
SSL certificates	1001	1 per HTTP listener
Maximum SSL certificate size	V1 SKU - 10 KB V2 SKU - 16 KB
Maximum trusted client CA certificate size	25 KB	25 KB is the maximum aggregated size of root and intermediate certificates contained in an uploaded pem or cer file.
Maximum trusted client CA certificates	200	100 per SSL Profile
Authentication certificates	100
Trusted root certificates	100
Request timeout minimum	1 second
Request timeout maximum to private backend	24 hours
Request timeout maximum to external backend	4 minutes
Number of sites	1001	1 per HTTP listener
URL maps per listener	1
Host names per listener	5
Maximum path-based rules per URL map	100
Redirect configurations	1001
Number of rewrite rule sets	400
Number of Header or URL configuration per rewrite rule set	40
Number of conditions per rewrite rule set	40
Concurrent WebSocket connections	Medium gateways 20k2 Large gateways 50k2
Maximum URL length	32 KB
Maximum header size	32 KB
Maximum header field size for HTTP/2	8 KB
Maximum header size for HTTP/2	16 KB
Maximum requests per HTTP/2 connection	1000	The total number of requests that can share the same frontend HTTP/2 connection
Maximum file upload size (Standard SKU)	V1 - 2 GB V2 - 4 GB	This maximum size limit is shared with the request body
Maximum file upload size (WAF SKU)	V1 Medium - 100 MB V1 Large - 500 MB V2 - 750 MB V2 (with CRS 3.2 or DRS) - 4 GB3	1 MB - Minimum Value 100 MB - Default value V2 with CRS 3.2 or DRS - can be turned On/Off
Maximum request size limit Standard SKU (without files)	V1 - 2 GB V2 - 4 GB
Maximum request size limit WAF SKU (without files)	V1 or V2 (with CRS 3.1 and older) - 128 KB V2 (with CRS 3.2 or DRS) - 2 MB3	8 KB - Minimum Value 128 KB - Default value V2 with CRS 3.2 or DRS - can be turned On/Off
Maximum request inspection limit WAF SKU	V1 or V2 (with CRS 3.1 and older) - 128 KB V2 (with CRS 3.2 or DRS) - 2 MB3	8 KB - Minimum Value 128 KB - Default value V2 with CRS 3.2 or DRS - can be turned On/Off
Maximum Private Link Configurations	2	1 for public IP, 1 for private IP
Maximum Private Link IP Configurations	8
Maximum WAF custom rules per WAF policy	100
WAF IP address ranges per match condition	540 600 - with CRS 3.2 or DRS
Maximum WAF exclusions per Application Gateway	40 200 - with CRS 3.2 or DRS
WAF string match values per match condition	10

¹ The number of resources listed in the table applies to standard Application Gateway SKUs and WAF-enabled SKUs running CRS 3.2 or DRS. For WAF-enabled SKUs running CRS 3.1 or lower, the supported number is 40. For more information, see WAF engine.

² Limit is per Application Gateway instance not per Application Gateway resource.

³ Must define the value via WAF Policy for Application Gateway.

Application Gateway for Containers limits

Resource	Limit
Application Gateway for Containers	1000 per subscription
Associations	1 per gateway
Frontends	5 per gateway

Kubernetes Ingress and Gateway API configuration limits

Resource	Limit
Resource naming	128 characters
Namespace naming	128 characters
Listeners per gateway	64 listeners per gateway resource (enforced by Gateway API)
Total AGC references	5 per ALB controller
Total certificate references	100 per AGC
Total listeners	200 per AGC
Total routes	200 per AGC
Total rules	200 per AGC
Total services	100 per AGC
Total endpoints	5000 per AGC

Azure Bastion limits

An instance is an optimized Azure VM that is created when you configure Azure Bastion. When you configure Azure Bastion using the Basic SKU, 2 instances are created. If you use the Standard SKU, you can specify the number of instances between 2-50.

Workload Type*	Session Limit per Instance**
Light	25
Medium	20
Heavy	2

*These workload types are defined here: Remote Desktop workloads
**These limits are based on RDP performance tests for Azure Bastion. The numbers may vary due to other on-going RDP sessions or other on-going SSH sessions.

Azure DNS limits

Public DNS

Public DNS zones

Resource	Limit
Public DNS zones per subscription	250 1
Record sets per public DNS zone	10,000 1
Records per record set in public DNS zone	20 1
Number of Alias records for a single Azure resource	20

¹If you need to increase these quota limits, contact Azure Support.

Public DNS zone operations

Operation	Limit (per zone)
Create	40/min
Delete	40/min
Get	1000/min
List	60/min
List By Resource Group	60/min (per resource group)
Update	40/min

Public DNS resource record operations

Operation	Limit (per zone)
Create	200/min
Delete	200/min
Get	2000/min
List By DNS Zone	60/min
List By Type	60/min
Update	200/min

Private DNS

Private DNS zones

Resource	Limit
Private DNS zones per subscription	1000
Record sets per private DNS zone	25000
Records per record set for private DNS zones	20
Virtual Network Links per private DNS zone	1000
Virtual Networks Links per private DNS zones with autoregistration enabled	100
Number of private DNS zones a virtual network can get linked to with autoregistration enabled	1
Number of private DNS zones a virtual network can get linked	1000

Private DNS zone operations

Operation	Limit (per subscription)
Create	40/min
Delete	40/min
Get	200/min (per zone)
List by subscription	60/min
List by resource group	100/min (per resource group)
Update	40/min

Private DNS resource record operations

Operation	Limit (per zone)
Create	60/min
Delete	60/min
Get	200/min
List	100/min
Update	60/min

Virtual network links operations

Operation	Limit (per zone)
Create	60/min
Delete	60/min
Get	100/min
List by virtual network	20/min
Update	60/min

Azure-provided DNS resolver VM limits

Resource	Limit
Number of DNS queries a virtual machine can send to Azure DNS resolver, per second	1000 1
Maximum number of DNS queries queued (pending response) per virtual machine	200 1

¹These limits are applied to every individual virtual machine and not at the virtual network level. DNS queries exceeding these limits are dropped. These limits apply to the default Azure resolver, not the DNS private resolver.

DNS Private Resolver¹

Resource	Limit
DNS private resolvers per subscription	15
Inbound endpoints per DNS private resolver	5
Outbound endpoints per DNS private resolver	5
Forwarding rules per DNS forwarding ruleset	1000
Virtual network links per DNS forwarding ruleset	500
Outbound endpoints per DNS forwarding ruleset	2
DNS forwarding rulesets per outbound endpoint	2
Target DNS servers per forwarding rule	6
QPS per endpoint	10,000

¹Different limits might be enforced by the Azure portal until the portal is updated. Use PowerShell to provision elements up to the most current limits.

Azure Firewall limits

Resource	Limit
Max Data throughput	100 Gbps for Premium, 30 Gbps for Standard, 250 Mbps for Basic (preview) SKU For more information, see Azure Firewall performance.
Rule limits	20,000 unique source/destinations in network rules Unique source/destinations in network = (Source addresses + Source IP Groups) * (Destination addresses + Destination Fqdn count + Destination IP Groups) * (IP protocols count) * (Destination ports) You can track the Firewall Policy network rule count in the policy analytics under the Insights tab. As a proxy, you can also monitor your Firewall Latency Probe metrics to ensure it stays within 20 ms even during peak hours.
Total size of rules within a single Rule Collection Group	1 MB for Firewall policies created before July 2022 2 MB for Firewall policies created after July 2022
Number of Rule Collection Groups in a firewall policy	50 for Firewall policies created before July 2022 90 for Firewall policies created after July 2022
Maximum DNAT rules (Maximum external destinations)	250 maximum [number of firewall public IP addresses + unique destinations (destination address, port, and protocol)] The DNAT limitation is due to the underlying platform. For example, you can configure 500 UDP rules to the same destination IP address and port (one unique destination), while 500 rules to the same IP address but to 500 different ports exceeds the limit (500 unique destinations). If you need more than 250, you'll need to add another firewall.
Minimum AzureFirewallSubnet size	/26
Port range in network and application rules	1 - 65535
Public IP addresses	250 maximum. All public IP addresses can be used in DNAT rules and they all contribute to available SNAT ports.
IP addresses in IP Groups	Maximum of 200 unique IP Groups per firewall policy. Maximum 5000 individual IP addresses or IP prefixes per each IP Group.
Route table	By default, AzureFirewallSubnet has a 0.0.0.0/0 route with the NextHopType value set to Internet. Azure Firewall must have direct Internet connectivity. If your AzureFirewallSubnet learns a default route to your on-premises network via BGP, you must override that with a 0.0.0.0/0 UDR with the NextHopType value set as Internet to maintain direct Internet connectivity. By default, Azure Firewall doesn't support forced tunneling to an on-premises network. However, if your configuration requires forced tunneling to an on-premises network, Microsoft will support it on a case by case basis. Contact Support so that we can review your case. If accepted, we'll allow your subscription and ensure the required firewall Internet connectivity is maintained.
FQDNs in network rules	For good performance, do not exceed more than 1000 FQDNs across all network rules per firewall.
TLS inspection timeout	120 seconds

Azure Front Door (classic) limits

• In addition to the following limits, there are composite limit on the number of routing rules, front-end domains, protocols, and paths.

Resource	Classic tier limit
Azure Front Door resources per subscription	100
Front-end hosts, which include custom domains per resource	500
Routing rules per resource	500
Rules per Rule set	25
Back-end pools per resource2	50
Back ends per back-end pool	100
Path patterns to match for a routing rule	25
URLs in a single cache purge call	100
Maximum bandwidth1	75 Gbps
Maximum requests per second per profile1	100,000
HTTP header size limit (per header)	32 KB
Custom web application firewall rules per policy	100
Web application firewall policy per subscription	100
Web application firewall match conditions per custom rule	10
Web application firewall IP address ranges per custom rule	600
Web application firewall string match values per match condition	10
Web application firewall string match value length	256
Web application firewall POST body parameter name length	256
Web application firewall HTTP header name length	256
Web application firewall cookie name length	256
Web application firewall exclusion limit	100
Web application firewall HTTP request body inspection limit	128 KB
Web application firewall custom response body length	32 KB

¹If the traffic isn't globally distributed and concentrated in one or more regions, or if a higher quota limited is need, create an Azure support request.

²To request a limit increase, create an Azure Support request. Free subscriptions including Azure Free Account and Azure for Students aren't eligible for limit or quota increases. If you have a free subscription, you can upgrade to a Pay-As-You-Go subscription.

Azure Front Door Standard and Premium service limits

• Maximum of 500 total Standard and Premium profiles per subscription.
• In addition to the following limits, there are composite limit on the number of routes, domains, protocols, and paths.

Resource	Standard tier limit	Premium tier limit
Maximum profiles per subscription	500	500
Maximum endpoint per profile	10	25
Maximum custom domain per profile	100	500
Maximum origin groups per profile	100	200
Maximum origins per origin group	50	50
Maximum origins per profile	100	200
Maximum origin timeout	16 - 240 secs	16 - 240 secs
Maximum routes per profile	100	200
Maximum rule set per profile	100	200
Maximum rules per route	100	100
Maximum rules per rule set	100	100
Maximum bandwidth1	75 Gbps	75 Gbps
Maximum requests per second per profile1	100,000	100,000
Path patterns to match for a routing rule	25	50
URLs in a single cache purge call	100	100
Maximum security policy per profile	100	200
Maximum associations per security policy	110	225
Maximum secrets per profile	100	500
HTTP header size limit (per header)	32 KB	32 KB
Web Application Firewall (WAF) policy per subscription	100	100
WAF custom rules per policy	100	100
WAF match conditions per custom rule	10	10
WAF custom regex rules per policy	5	5
WAF IP address ranges per match conditions	600	600
WAF string match values per match condition	10	10
WAF string match value length	256	256
WAF POST body parameter name length	256	256
WAF HTTP header name length	256	256
WAF cookie name length	256	256
WAF exclusion per policy	100	100
WAF HTTP request body and file upload inspection limit	128 KB	128 KB
WAF custom response body length	32 KB	32 KB

¹If the traffic isn't globally distributed and concentrated in one or more regions, or if a higher quota limited is need, create an Azure support request.

Timeout values

From Client to Front Door

• Front Door has an idle TCP connection timeout of 61 seconds.

Front Door to application back-end

• After the HTTP request gets forwarded to the back end, Azure Front Door waits for 60 seconds (Standard and Premium) or 30 seconds (classic) for the first packet from the back end. Then it returns a 503 error to the client, or 504 for a cached request. You can configure this value using the originResponseTimeoutSeconds field in Azure Front Door Standard and Premium API, or the sendRecvTimeoutSeconds field in the Azure Front Door (classic) API.

• After the back end receives the first packet, if the origin pauses for any reason in the middle of the response body beyond the originResponseTimeoutSeconds or sendRecvTimeoutSeconds, the response will be canceled.

• Front Door takes advantage of HTTP keep-alive to keep connections open for reuse from previous requests. These connections have an idle timeout of 90 seconds. Azure Front Door would disconnect idle connections after reaching the 90-second idle timeout. This timeout value can't be configured.

Upload and download data limit

	With chunked transfer encoding (CTE)	Without HTTP chunking
Download	There's no limit on the download size.	There's no limit on the download size.
Upload	There's no limit as long as each CTE upload is less than 2 GB.	The size can't be larger than 2 GB.

Other limits

• Maximum URL size - 8,192 bytes - Specifies maximum length of the raw URL (scheme + hostname + port + path + query string of the URL)
• Maximum Query String size - 4,096 bytes - Specifies the maximum length of the query string, in bytes.
• Maximum HTTP response header size from health probe URL - 4,096 bytes - Specified the maximum length of all the response headers of health probes.
• Maximum rules engine action header value character: 640 characters.
• Maximum rules engine condition header value character: 256 characters.
• Maximum ETag header size: 128 bytes
• Maximum endpoint name for Standard and Premium: 46 characters.

For more information about limits that apply to Rules Engine configurations, see rules engine terminology

Azure Network Watcher limits

Resource	Limit
Network Watcher instances per region per subscription	1 (One instance in a region to enable access to the service in the region)
Connection monitors per region per subscription	100
Maximum test groups per a connection monitor	20
Maximum sources and destinations per a connection monitor	100
Maximum test configurations per a connection monitor	20
Packet capture sessions per region per subscription	10,000 (Number of sessions only, not saved captures)
VPN troubleshoot operations per subscription	1 (Number of operations at one time)

Azure Route Server limits

Resource	Limit
Number of BGP peers	8
Number of routes each BGP peer can advertise to Azure Route Server 1	1,000
Number of VMs in the virtual network (including peered virtual networks) that Azure Route Server can support	4,000
Number of virtual networks that Azure Route Server can support	500
Number of total on-premises and Azure Virtual Network prefixes that Azure Route Server can support	10,000

¹ If your NVA advertises more routes than the limit, the BGP session gets dropped.

Note

The total number of routes advertised from VNet address space and Route Server towards ExpressRoute circuit, when Branch-to-branch enabled, must not exceed 1,000. For more information, see Route advertisement limits of ExpressRoute.

ExpressRoute limits

Resource	Limit
ExpressRoute circuits per subscription	50 (Submit a support request to increase limit)
ExpressRoute circuits per region per subscription, with Azure Resource Manager	10
Maximum number of circuits in the same peering location linked to the same virtual network	4
Maximum number of circuits in different peering locations linked to the same virtual network	Standard / ERGw1Az - 4 High Perf / ERGw2Az - 8 Ultra Performance / ErGw3Az - 16
Maximum number of IPs for ExpressRoute provider circuit with Fastpath	25,000
Maximum number of IPs for ExpressRoute Direct 10 Gbps with Fastpath	100,000
Maximum number of IPs for ExpressRoute Direct 100 Gbps with Fastpath	200,000
Maximum number of flows for ExpressRoute Traffic Collector	300,000

Route advertisement limits

Resource	Local / Standard SKU	Premium SKU
Maximum number of IPv4 routes advertised to Azure private peering from on-premises	4,000	10,000
Maximum number of IPv6 routes advertised to Azure private peering from on-premises	100	100
Maximum number of IPv4 routes advertised from Azure private peering from the VNet address space to ExpressRoute virtual network gateway	1,000	1,000
Maximum number of IPv6 routes advertised from Azure private peering from the VNet address space to ExpressRoute virtual network gateway	100	100
Maximum number of IPv4 routes advertised to Microsoft peering from on-premises	200	200
Maximum number of IPv6 routes advertised to Microsoft peering from on-premises	200	200

Virtual networks links allowed for each ExpressRoute circuit limit

Circuit size	Local / Standard SKU	Premium SKU
50 Mbps	10	20
100 Mbps	10	25
200 Mbps	10	25
500 Mbps	10	40
1 Gbps	10	50
2 Gbps	10	60
5 Gbps	10	75
10 Gbps	10	100
40 Gbps*	10	100
100 Gbps*	10	100

*100-Gbps ExpressRoute Direct Only

Note

Global Reach connections count against the limit of virtual network connections per ExpressRoute Circuit. For example, a 10 Gbps Premium Circuit would allow for 5 Global Reach connections and 95 connections to the ExpressRoute Gateways or 95 Global Reach connections and 5 connections to the ExpressRoute Gateways or any other combination up to the limit of 100 connections for the circuit.

ExpressRoute gateway performance limits

The following tables provide an overview of the different types of gateways, their respective limitations, and their expected performance metrics. These numbers are derived from the following testing conditions and represent the max support limits. Actual performance may vary, depending on how closely traffic replicates these testing conditions.

Testing conditions

Gateway SKU	Traffic sent from on-premises	Number of routes advertised by gateway	Number of routes learned by gateway
Standard/ERGw1Az	1 Gbps	500	4000
High Performance/ERGw2Az	2 Gbps	500	9,500
Ultra Performance/ErGw3Az	10 Gbps	500	9,500
ErGwScale (per scale unit)	1 Gbps	500	4,000

Note

ExpressRoute can facilitate up to 11,000 routes that spans virtual network address spaces, on-premises network, and any relevant virtual network peering connections. To ensure stability of your ExpressRoute connection, refrain from advertising more than 11,000 routes to ExpressRoute.

Performance results

This table applies to both the Azure Resource Manager and classic deployment models.

Gateway SKU	Mega-Bits per second	Packets per second	Supported number of VMs in the virtual network 1	Flow count limit
Standard/ERGw1Az	1,000	100,000	2,000	200,000
High Performance/ERGw2Az	2,000	200,000	4,500	400,000
Ultra Performance/ErGw3Az	10,000	1,000,000	11,000	1,000,000
ErGwScale (per scale unit)	1,000	100,000	2,000	100,000 per scale unit

^{1 The values in the table are estimates and vary depending on the CPU utilization of the gateway. If the CPU utilization is high and the number of supported VMs gets exceeded, the gateway will start to drop packets.}

Important

• Application performance depends on multiple factors, such as end-to-end latency, and the number of traffic flows the application opens. The numbers in the table represent the upper limit that the application can theoretically achieve in an ideal environment. Additionally, Microsoft performs routine host and OS maintenance on the ExpressRoute Virtual Network Gateway, to maintain reliability of the service. During a maintenance period, the control plane and data path capacity of the gateway is reduced.
• During a maintenance period, you may experience intermittent connectivity issues to private endpoint resources.
• ExpressRoute supports a maximum TCP and UDP packet size of 1400 bytes. Packet size larger than 1400 bytes will get fragmented.
• Azure Route Server can support up to 4000 VMs. This limit includes VMs in virtual networks that are peered. For more information, see Azure Route Server limitations.

NAT Gateway limits

The following limits apply to NAT gateway resources managed through Azure Resource Manager per region per subscription. Learn how to view your current resource usage against your subscription limits.

Resource	Limit
Public IP addresses	16 per NAT gateway
Subnets	800 per NAT gateway
Data throughput1	50 Gbps
NAT gateways for Enterprise and CSP agreements2	1,000 per subscription per region
NAT gateways for Sponsored and pay-as-you-go2	100 per subscription per region
NAT gateways for Free Trial and all other offer types2	15 per subscription per region
Packets processed	1M - 5M packets per second
Connections to same destination endpoint	50,000 connections to the same destination per public IP
Connections total	2M connections per NAT gateway

¹ The total data throughput of 50 Gbps is split between outbound and inbound (return) data through a NAT gateway resource. Data throughput is rate limited at 25 Gbps for outbound data and 25 Gbps for inbound (response) data through NAT gateway.

² Default limits for NAT gateways vary by offer category type, such as Free Trial, pay-as-you-go, and CSP. For example, the default for Enterprise Agreement subscriptions is 1000.

Private Link limits

The following limits apply to Azure private link:

Resource	Limit
Number of private endpoints per virtual network	1000
Number of private endpoints across peered virtual networks	4000
Number of private endpoints per subscription	64000
Number of private link services per subscription	800
Number of private link services per Standard Load Balancer	8
Number of IP Configurations on a private link service	8 (This number is for the NAT IP addresses used per PLS)
Number of private endpoints on the same private link service	1000
Number of subscriptions allowed in visibility setting on private link service	100
Number of subscriptions allowed in auto-approval setting on private link service	100
Number of private endpoints per key vault	64
Number of key vaults with private endpoints per subscription	400
Number of private DNS zone groups that can be linked to a private endpoint	1
Number of DNS zones in each group	5
Number of private IP addresses on private endpoint network interface	500

Traffic Manager limits

Resource	Limit
Profiles per subscription	200 1
Endpoints per profile	200

¹If you need to increase these limits, contact Azure Support.

VPN Gateway limits

The following limits apply to VPN Gateway resources and VPN Gateway virtual network gateways, unless otherwise stated.

Resource	Limit
VNet Address Prefixes	600 per VPN gateway
Aggregate BGP routes	4,000 per VPN gateway
Local Network Gateway address prefixes	1000 per local network gateway
S2S connections	Limit depends on the gateway SKU. See the Limits by gateway SKU table.
P2S connections	Limit depends on the gateway SKU. See the Limits by gateway SKU table.
P2S route limit - IKEv2	256 for non-Windows / 25 for Windows
P2S route limit - OpenVPN	1000
Max. flows	500K inbound and 500K outbound for VpnGw1-5/AZ
Traffic Selector Policies	100
Custom APIPA BGP addresses	32
Supported number of VMs in the virtual network	Limit depends on the gateway SKU. See the Limits by gateway SKU table.

Limits by gateway SKU

VPN Gateway Generation	SKU	S2S/VNet-to-VNet Tunnels	P2S SSTP Connections	P2S IKEv2/OpenVPN Connections	Aggregate Throughput Benchmark	BGP	Zone-redundant	Supported Number of VMs in the Virtual Network
Generation1	Basic	Max. 10	Max. 128	Not Supported	100 Mbps	Not Supported	No	200
Generation1	VpnGw1	Max. 30	Max. 128	Max. 250	650 Mbps	Supported	No	450
Generation1	VpnGw2	Max. 30	Max. 128	Max. 500	1 Gbps	Supported	No	1300
Generation1	VpnGw3	Max. 30	Max. 128	Max. 1000	1.25 Gbps	Supported	No	4000
Generation1	VpnGw1AZ	Max. 30	Max. 128	Max. 250	650 Mbps	Supported	Yes	1000
Generation1	VpnGw2AZ	Max. 30	Max. 128	Max. 500	1 Gbps	Supported	Yes	2000
Generation1	VpnGw3AZ	Max. 30	Max. 128	Max. 1000	1.25 Gbps	Supported	Yes	5000
Generation2	VpnGw2	Max. 30	Max. 128	Max. 500	1.25 Gbps	Supported	No	685
Generation2	VpnGw3	Max. 30	Max. 128	Max. 1000	2.5 Gbps	Supported	No	2240
Generation2	VpnGw4	Max. 100*	Max. 128	Max. 5000	5 Gbps	Supported	No	5300
Generation2	VpnGw5	Max. 100*	Max. 128	Max. 10000	10 Gbps	Supported	No	6700
Generation2	VpnGw2AZ	Max. 30	Max. 128	Max. 500	1.25 Gbps	Supported	Yes	2000
Generation2	VpnGw3AZ	Max. 30	Max. 128	Max. 1000	2.5 Gbps	Supported	Yes	3300
Generation2	VpnGw4AZ	Max. 100*	Max. 128	Max. 5000	5 Gbps	Supported	Yes	4400
Generation2	VpnGw5AZ	Max. 100*	Max. 128	Max. 10000	10 Gbps	Supported	Yes	9000

For more information about gateway SKUs and limits, see About gateway SKUs.

Gateway performance limits

The table in this section lists the results of performance tests for VpnGw SKUs. A VPN tunnel connects to a VPN gateway instance. Each instance throughput is mentioned in the throughput table in the previous section and is available aggregated across all tunnels connecting to that instance. The table shows the observed bandwidth and packets per second throughput per tunnel for the different gateway SKUs. All testing was performed between gateways (endpoints) within Azure across different regions with 100 connections and under standard load conditions. We used publicly available iPerf and CTSTraffic tools to measure performances for site-to-site connections

• The best performance was obtained when we used the GCMAES256 algorithm for both IPsec Encryption and Integrity.
• Average performance was obtained when using AES256 for IPsec Encryption and SHA256 for Integrity.
• The lowest performance was obtained when we used DES3 for IPsec Encryption and SHA256 for Integrity.

Generation	SKU	Algorithms used	Throughput observed per tunnel	Packets per second per tunnel observed
Generation1	VpnGw1	GCMAES256 AES256 & SHA256 DES3 & SHA256	650 Mbps 500 Mbps 130 Mbps	62,000 47,000 12,000
Generation1	VpnGw2	GCMAES256 AES256 & SHA256 DES3 & SHA256	1.2 Gbps 650 Mbps 140 Mbps	100,000 61,000 13,000
Generation1	VpnGw3	GCMAES256 AES256 & SHA256 DES3 & SHA256	1.25 Gbps 700 Mbps 140 Mbps	120,000 66,000 13,000
Generation1	VpnGw1AZ	GCMAES256 AES256 & SHA256 DES3 & SHA256	650 Mbps 500 Mbps 130 Mbps	62,000 47,000 12,000
Generation1	VpnGw2AZ	GCMAES256 AES256 & SHA256 DES3 & SHA256	1.2 Gbps 650 Mbps 140 Mbps	110,000 61,000 13,000
Generation1	VpnGw3AZ	GCMAES256 AES256 & SHA256 DES3 & SHA256	1.25 Gbps 700 Mbps 140 Mbps	120,000 66,000 13,000
Generation2	VpnGw2	GCMAES256 AES256 & SHA256 DES3 & SHA256	1.25 Gbps 550 Mbps 130 Mbps	120,000 52,000 12,000
Generation2	VpnGw3	GCMAES256 AES256 & SHA256 DES3 & SHA256	1.5 Gbps 700 Mbps 140 Mbps	140,000 66,000 13,000
Generation2	VpnGw4	GCMAES256 AES256 & SHA256 DES3 & SHA256	2.3 Gbps 700 Mbps 140 Mbps	220,000 66,000 13,000
Generation2	VpnGw5	GCMAES256 AES256 & SHA256 DES3 & SHA256	2.3 Gbps 700 Mbps 140 Mbps	220,000 66,000 13,000
Generation2	VpnGw2AZ	GCMAES256 AES256 & SHA256 DES3 & SHA256	1.25 Gbps 550 Mbps 130 Mbps	120,000 52,000 12,000
Generation2	VpnGw3AZ	GCMAES256 AES256 & SHA256 DES3 & SHA256	1.5 Gbps 700 Mbps 140 Mbps	140,000 66,000 13,000
Generation2	VpnGw4AZ	GCMAES256 AES256 & SHA256 DES3 & SHA256	2.3 Gbps 700 Mbps 140 Mbps	220,000 66,000 13,000
Generation2	VpnGw5AZ	GCMAES256 AES256 & SHA256 DES3 & SHA256	2.3 Gbps 700 Mbps 140 Mbps	220,000 66,000 13,000

Virtual WAN limits

Resource	Limit
VPN (branch) connections per hub	1,000
Aggregate throughput per Virtual WAN Site-to-site VPN gateway	20 Gbps
Throughput per Virtual WAN VPN connection (2 tunnels)	2 Gbps with 1 Gbps/IPsec tunnel
Point-to-site users per hub	100,000
Aggregate throughput per Virtual WAN User VPN (Point-to-site) gateway	200 Gbps
Aggregate throughput per Virtual WAN ExpressRoute gateway	20 Gbps
ExpressRoute circuit connections per hub	8
VNet connections per hub	500 minus total number of hubs in Virtual WAN
Aggregate throughput per Virtual WAN hub router	50 Gbps for VNet to VNet transit
VM workload across all VNets connected to a single Virtual WAN hub	2000 (If you want to raise the limit or quota above the default limit, see hub settings).
Total number of routes the hub can accept from its connected resources (virtual networks, branches, other virtual hubs, etc.)	10,000

Notification Hubs limits

Tier	Free	Basic	Standard
Included pushes	1 million	10 million	10 million
Active devices	500	200,000	10 million
Tag quota per installation or registration	60	60	60

For more information on limits and pricing, see Notification Hubs pricing.

Microsoft Dev Box limits

Subscription type	VM Cores	Network Connections	Dev centers	Dev box definitions	Dev box projects
Pay as you go	20	5	2	200	500
Azure Pass	20	5	2	200	500
CSP	20	5	2	200	500
Free trial	0	0	0	0	0
Azure for Students	0	0	0	0	0
Enterprise	80	10	5	200	500
MSDN	n/a	5	2	200	500

Microsoft Purview limits

The latest values for Microsoft Purview quotas can be found in the Microsoft Purview quota page.

Microsoft Sentinel limits

For Microsoft Sentinel limits, see Service limits for Microsoft Sentinel

Service Bus limits

The following table lists quota information specific to Azure Service Bus messaging. For information about pricing and other quotas for Service Bus, see Service Bus pricing.

Quota name	Scope	Value	Notes
Maximum number of namespaces per Azure subscription	Namespace	1000 (default and maximum)	This limit is based on the Microsoft.ServiceBus provider, not based on the tier. Therefore, it's the total number of namespaces across all tiers. Subsequent requests for additional namespaces are rejected.
Queue or topic size	Entity	1, 2, 3, 4 GB or 5 GB In the Premium SKU, and the Standard SKU with partitioning enabled, the maximum queue or topic size is 80 GB. Total size limit for a premium namespace per messaging unit is 1 TB. Total size of all entities in a namespace can't exceed this limit.	Defined upon creation/updation of the queue or topic. Subsequent incoming messages are rejected, and an exception is received by the calling code. Currently, a large message (size > 1 MB) sent to a queue is counted twice. And, a large message (size > 1 MB) sent to a topic is counted X + 1 times, where X is the number of subscriptions to the topic.
Number of concurrent connections on a namespace	Namespace	Net Messaging: 1,000. AMQP: 5,000.	Subsequent requests for additional connections are rejected, and an exception is received by the calling code. REST operations don't count toward concurrent TCP connections.
Number of concurrent receive requests on a queue, topic, or subscription entity	Entity	5,000	Subsequent receive requests are rejected, and an exception is received by the calling code. This quota applies to the combined number of concurrent receive operations across all subscriptions on a topic.
Number of topics or queues per namespace	Namespace	10,000 for the Basic or Standard tier. The total number of topics and queues in a namespace must be less than or equal to 10,000. For the Premium tier, 1,000 per messaging unit (MU).	Subsequent requests for creation of a new topic or queue on the namespace are rejected. As a result, if configured through the Azure portal, an error message is generated. If called from the management API, an exception is received by the calling code.
Number of partitioned topics or queues per namespace	Namespace	Basic and Standard tiers: 100. Each partitioned queue or topic counts toward the quota of 1,000 entities per namespace.	Subsequent requests for creation of a new partitioned topic or queue in the namespace are rejected. As a result, if configured through the Azure portal, an error message is generated. If called from the management API, the exception QuotaExceededException is received by the calling code. If you want to have more partitioned entities in a basic or a standard tier namespace, create additional namespaces.
Maximum size of any messaging entity path: queue or topic	Entity	260 characters.
Maximum size of any messaging entity name: namespace, subscription, or subscription rule	Entity	50 characters.
Maximum size of a message ID	Entity	128
Maximum size of a message session ID	Entity	128
Message size for a queue, topic, or subscription entity	Entity	256 KB for Standard tier 100 MB for Premium tier on AMQP, and 1 MB for Premium on HTTP and SBMP. The maximum size for batches is 256 KB for the Standard tier, and 1 MB for the Premium tier. The message size includes the size of properties (system and user) and the size of payload. The size of system properties varies depending on your scenario.	Incoming messages that exceed these quotas are rejected, and an exception is received by the calling code.
Message property size for a queue, topic, or subscription entity	Entity	Maximum message property size for each property is 32 KB. Cumulative size of all properties can't exceed 64 KB. This limit applies to the entire header of the brokered message, which has both user properties and system properties, such as sequence number, label, and message ID. Maximum number of header properties in property bag: byte/int.MaxValue.	The exception SerializationException is generated.
Number of subscriptions per topic	Entity	2,000 per-topic for the Standard tier and Premium tier.	Subsequent requests for creating additional subscriptions for the topic are rejected. As a result, if configured through the portal, an error message is shown. If called from the management API, an exception is received by the calling code.
Number of SQL filters per topic	Entity	2,000	Subsequent requests for creation of additional filters on the topic are rejected, and an exception is received by the calling code.
Number of correlation filters per topic	Entity	100,000	Subsequent requests for creation of additional filters on the topic are rejected, and an exception is received by the calling code.
Size of SQL filters or actions	Namespace	Maximum length of filter condition string: 1,024 (1 K). Maximum length of rule action string: 1,024 (1 K). Maximum number of expressions per rule action: 32.	Subsequent requests for creation of additional filters are rejected, and an exception is received by the calling code.
Number of shared access authorization rules per namespace, queue, or topic	Entity, namespace	Maximum number of rules per entity type: 12. Rules that are configured on a Service Bus namespace apply to all types: queues, topics.	Subsequent requests for creation of additional rules are rejected, and an exception is received by the calling code.
Number of messages per transaction	Transaction	100 For both Send() and SendAsync() operations.	Additional incoming messages are rejected, and an exception stating "Can't send more than 100 messages in a single transaction" is received by the calling code.
Maximum number of messages deleted in DeleteMessagesAsync call	Entity	4000
Maximum number of messages returned in PeekMessagesAsync call	Entity	250
Number of virtual network and IP filter rules	Namespace	128

Site Recovery limits

The following limits apply to Azure Site Recovery.

Limit identifier	Limit
Number of vaults per subscription	500
Number of protected disks per subscription (Both Data and OS)	3000
Number of appliances per Recovery Services vault	250
Number of protection groups per Recovery Services vault	No limit
Number of recovery plans per Recovery Services vault	No limit
Number of servers per protection group	No limit
Number of servers per recovery plan	100

SQL Database limits

For SQL Database limits, see SQL Database resource limits for single databases, SQL Database resource limits for elastic pools and pooled databases, and SQL Database resource limits for SQL Managed Instance.

The maximum number of private endpoints per Azure SQL Database logical server is 250.

Azure Synapse Analytics limits

Azure Synapse Analytics has the following default limits to ensure customer's subscriptions are protected from each other's workloads. To raise the limits to the maximum for your subscription, contact support.

Azure Synapse limits for workspaces

For Pay-As-You-Go, Free Trial, Azure Pass, and Azure for Students subscription offer types:

Resource	Default limit	Maximum limit
Synapse workspaces in an Azure subscription	2	2

For other subscription offer types:

Resource	Default limit	Maximum limit
Synapse workspaces in an Azure subscription per region	20	100

Azure Synapse limits for Apache Spark

For Pay-As-You-Go, Free Trial, Azure Pass, and Azure for Students subscription offer types:

Resource	Memory Optimized cores	GPU cores
Spark cores in a Synapse workspace	12	48

For other subscription offer types:

Resource	Memory Optimized cores	GPU cores
Spark cores in a Synapse workspace	50	50

For additional limits for Spark pools, see Concurrency and API rate limits for Apache Spark pools in Azure Synapse Analytics.

Azure Synapse limits for pipelines

Resource	Default limit	Maximum limit
Synapse pipelines in a Synapse workspace	800	800
Total number of entities, such as pipelines, data sets, triggers, linked services, Private Endpoints, and integration runtimes, within a workspace	5,000	Find out how to request a quota increase from support.
Total CPU cores for Azure-SSIS Integration Runtimes under one workspace	256	Find out how to request a quota increase from support.
Concurrent pipeline runs per workspace that's shared among all pipelines in the workspace	10,000	10,000
Concurrent External activity runs per workspace per Azure Integration Runtime region External activities are managed on integration runtime but execute on linked services, including Databricks, stored procedure, HDInsight, Web, and others. This limit does not apply to Self-hosted IR.	3,000	3,000
Concurrent Pipeline activity runs per workspace per Azure Integration Runtime region Pipeline activities execute on integration runtime, including Lookup, GetMetadata, and Delete. This limit does not apply to Self-hosted IR.	1,000	1,000
Concurrent authoring operations per workspace per Azure Integration Runtime region Including test connection, browse folder list and table list, preview data. This limit does not apply to Self-hosted IR.	200	200
Concurrent Data Integration Units1 consumption per workspace per Azure Integration Runtime region	Region group 12: 6,000 Region group 22: 3,000 Region group 32: 1,500 Managed virtual network2: 2,400	Region group 12: 6,000 Region group 22: 3,000 Region group 32: 1,500 Managed virtual network: Find out how to request a quota increase from support.
Maximum activities per pipeline, which includes inner activities for containers	40	40
Maximum number of linked integration runtimes that can be created against a single self-hosted integration runtime	100	Find out how to request a quota increase from support.
Maximum parameters per pipeline	50	50
ForEach items	100,000	100,000
ForEach parallelism	20	50
Maximum queued runs per pipeline	100	100
Characters per expression	8,192	8,192
Minimum tumbling window trigger interval	5 min	15 min
Maximum timeout for pipeline activity runs	7 days	7 days
Bytes per object for pipeline objects3	200 KB	200 KB
Bytes per object for dataset and linked service objects3	100 KB	2,000 KB
Bytes per payload for each activity run4	896 KB	896 KB
Data Integration Units1 per copy activity run	256	256
Write API calls	1,200/h	1,200/h This limit is imposed by Azure Resource Manager, not Azure Synapse Analytics.
Read API calls	12,500/h	12,500/h This limit is imposed by Azure Resource Manager, not Azure Synapse Analytics.
Monitoring queries per minute	1,000	1,000
Maximum time of data flow debug session	8 hrs	8 hrs
Concurrent number of data flows per integration runtime	50	Find out how to request a quota increase from support.
Concurrent number of data flows per integration runtime in managed vNet	20	Find out how to request a quota increase from support.
Concurrent number of data flow debug sessions per user per workspace	3	3
Data Flow Azure IR TTL limit	4 hrs	4 hrs
Meta Data Entity Size limit in a workspace	2 GB	Find out how to request a quota increase from support.

¹ The data integration unit (DIU) is used in a cloud-to-cloud copy operation, learn more from Data integration units (version 2). For information on billing, see Azure Synapse Analytics Pricing.

² Azure Integration Runtime is globally available to ensure data compliance, efficiency, and reduced network egress costs.

Region group	Regions
Region group 1	Central US, East US, East US 2, North Europe, West Europe, West US, West US 2
Region group 2	Australia East, Australia Southeast, Brazil South, Central India, Japan East, North Central US, South Central US, Southeast Asia, West Central US
Region group 3	Other regions

If managed virtual network is enabled, the data integration unit (DIU) in all region groups are 2,400.

³ Pipeline, data set, and linked service objects represent a logical grouping of your workload. Limits for these objects don't relate to the amount of data you can move and process with Azure Synapse Analytics. Synapse Analytics is designed to scale to handle petabytes of data.

⁴ The payload for each activity run includes the activity configuration, the associated dataset(s) and linked service(s) configurations if any, and a small portion of system properties generated per activity type. Limit for this payload size doesn't relate to the amount of data you can move and process with Azure Synapse Analytics. Learn about the symptoms and recommendation if you hit this limit.

Azure Synapse limits for dedicated SQL pools

For details of capacity limits for dedicated SQL pools in Azure Synapse Analytics, see dedicated SQL pool resource limits.

Azure Resource Manager limits for web service calls

Azure Resource Manager has limits for API calls. You can make API calls at a rate within the Azure Resource Manager API limits.

Virtual machine disk limits

You can attach a number of data disks to an Azure virtual machine (VM). Based on the scalability and performance targets for a VM's data disks, you can determine the number and type of disk that you need to meet your performance and capacity requirements.

Important

For optimal performance, limit the number of highly utilized disks attached to the virtual machine to avoid possible throttling. If all attached disks aren't highly utilized at the same time, the virtual machine can support a larger number of disks. Additionally, when creating a managed disk from an existing managed disk, only 49 disks can be created concurrently. More disks can be created after some of the initial 49 have been created.

For Azure managed disks:

The following table illustrates the default and maximum limits of the number of resources per region per subscription. The limits remain the same irrespective of disks encrypted with either platform-managed keys or customer-managed keys. There is no limit for the number of Managed Disks, snapshots and images per resource group.

Resource	Limit
Standard managed disks	50,000
Standard SSD managed disks	50,000
Premium SSD managed disks	50,000
Premium SSD v2 managed disks	1,000
Premium SSD v2 managed disks capacity2	32,768
Ultra disks	1,000
Ultra disk capacity2	32,768
Standard_LRS snapshots1	75,000
Standard_ZRS snapshots1	75,000
Managed image	50,000

¹An individual disk can have 500 incremental snapshots.

²This is the default max but higher capacities are supported by request. To request an increase in capacity, request a quota increase or contact Azure Support.

For standard storage accounts:

A Standard storage account has a maximum total request rate of 20,000 IOPS. The total IOPS across all of your virtual machine disks in a Standard storage account should not exceed this limit.

For unmanaged disks, you can roughly calculate the number of highly utilized disks supported by a single standard storage account based on the request rate limit. For example, for a Basic tier VM, the maximum number of highly utilized disks is about 66, which is 20,000/300 IOPS per disk. The maximum number of highly utilized disks for a Standard tier VM is about 40, which is 20,000/500 IOPS per disk.

For premium storage accounts:

A premium storage account has a maximum total throughput rate of 50 Gbps. The total throughput across all of your VM disks should not exceed this limit.

For more information, see Virtual machine sizes.

For VM Applications

When working with VM applications in Azure, you may encounter an error message that says "Operation could not be completed as it results in exceeding approved UnmanagedStorageAccountCount quota." This error occurs when you have reached the limit for the number of unmanaged storage accounts that you can use.

When you publish a VM application, Azure needs to replicate it across multiple regions. To do this, Azure creates an unmanaged storage account for each region. The number of unmanaged storage accounts that an application uses is determined by the number of replicas across all applications.

As a general rule, each storage account can accommodate up to 200 simultaneous connections. Below are options for resolving the "UnmanagedStorageAccountCount" error:

• Use page blobs for your source application blobs. Unmanaged accounts are only used for block blob replication. Page blobs have no such limits.
• Reduce the number of replicas for your VM Application versions or delete applications you no longer need.
• File a support request to obtain a quota increase.

For more information, see VM Applications.

Disk encryption sets

There's a limitation of 5000 disk encryption sets per region, per subscription. For more information, see the encryption documentation for Linux or Windows virtual machines. If you need to increase the quota, contact Azure support.

Managed virtual machine disks

Standard HDD managed disks

Standard Disk Type	S4	S6	S10	S15	S20	S30	S40	S50	S60	S70	S80
Disk size in GiB	32	64	128	256	512	1,024	2,048	4,096	8,192	16,384	32,767
Base IOPS per disk	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 1,300	Up to 2,000	Up to 2,000
*Expanded IOPS per disk	N/A	N/A	N/A	N/A	N/A	Up to 1,500	Up to 3,000	Up to 3,000	Up to 3,000	Up to 3,000	Up to 3,000
Base throughput per disk	Up to 60 MB/s	Up to 60 MB/s	Up to 60 MB/s	Up to 60 MB/s	Up to 60 MB/s	Up to 60 MB/s	Up to 60 MB/s	Up to 60 MB/s	Up to 300 MB/s	Up to 500 MB/s	Up to 500 MB/s
*Expanded throughput per disk	N/A	N/A	N/A	N/A	N/A	Up to 150 MB/s	Up to 300 MB/s	Up to 500 MB/s	Up to 500 MB/s	Up to 500 MB/s	Up to 500 MB/s

* Only applies to disks with performance plus (preview) enabled.

Standard SSD managed disks

Standard SSD sizes	E1	E2	E3	E4	E6	E10	E15	E20	E30	E40	E50	E60	E70	E80
Disk size in GiB	4	8	16	32	64	128	256	512	1,024	2,048	4,096	8,192	16,384	32,767
Base IOPS per disk	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 500	Up to 2,000	Up to 4,000	Up to 6,000
*Expanded IOPS per disk	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	Up to 1,500	Up to 3,000	Up to 6,000	Up to 6,000	Up to 6,000	Up to 6,000
Base throughput per disk	Up to 100 MB/s	Up to 100 MB/s	Up to 100 MB/s	Up to 100 MB/s	Up to 100 MB/s	Up to 100 MB/s	Up to 100 MB/s	Up to 100 MB/s	Up to 100 MB/s	Up to 100 MB/s	Up to 100 MB/s	Up to 400 MB/s	Up to 600 MB/s	Up to 750 MB/s
*Expanded throughput per disk	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	Up to 150 MB/s	Up to 300 MB/s	Up to 600 MB/s	Up to 750 MB/s	Up to 750 MB/s	Up to 750 MB/s
Max burst IOPS per disk	600	600	600	600	600	600	600	600	1000
Max burst throughput per disk	150 MB/s	150 MB/s	150 MB/s	150 MB/s	150 MB/s	150 MB/s	150 MB/s	150 MB/s	250 MB/s
Max burst duration	30 min	30 min	30 min	30 min	30 min	30 min	30 min	30 min	30 min

* Only applies to disks with performance plus (preview) enabled.

Premium SSD managed disks: Per-disk limits

Premium SSD sizes	P1	P2	P3	P4	P6	P10	P15	P20	P30	P40	P50	P60	P70	P80
Disk size in GiB	4	8	16	32	64	128	256	512	1,024	2,048	4,096	8,192	16,384	32,767
Base provisioned IOPS per disk	120	120	120	120	240	500	1,100	2,300	5,000	7,500	7,500	16,000	18,000	20,000
**Expanded provisioned IOPS per disk	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	8,000	16,000	20,000	20,000	20,000	20,000
Base provisioned Throughput per disk	25 MB/s	25 MB/s	25 MB/s	25 MB/s	50 MB/s	100 MB/s	125 MB/s	150 MB/s	200 MB/s	250 MB/s	250 MB/s	500 MB/s	750 MB/s	900 MB/s
**Expanded provisioned throughput per disk	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	300 MB/s	600 MB/s	900 MB/s	900 MB/s	900 MB/s	900 MB/s
Max burst IOPS per disk	3,500	3,500	3,500	3,500	3,500	3,500	3,500	3,500	30,000*	30,000*	30,000*	30,000*	30,000*	30,000*
Max burst throughput per disk	170 MB/s	170 MB/s	170 MB/s	170 MB/s	170 MB/s	170 MB/s	170 MB/s	170 MB/s	1,000 MB/s*	1,000 MB/s*	1,000 MB/s*	1,000 MB/s*	1,000 MB/s*	1,000 MB/s*
Max burst duration	30 min	30 min	30 min	30 min	30 min	30 min	30 min	30 min	Unlimited*	Unlimited*	Unlimited*	Unlimited*	Unlimited*	Unlimited*
Eligible for reservation	No	No	No	No	No	No	No	No	Yes, up to one year	Yes, up to one year	Yes, up to one year	Yes, up to one year	Yes, up to one year	Yes, up to one year

*Applies only to disks with on-demand bursting enabled.
** Only applies to disks with performance plus (preview) enabled.

Premium SSD managed disks: Per-VM limits

Resource	Limit
Maximum IOPS Per VM	80,000 IOPS with GS5 VM
Maximum throughput per VM	2,000 MB/s with GS5 VM

Unmanaged virtual machine disks

Standard unmanaged virtual machine disks: Per-disk limits

VM tier	Basic tier VM	Standard tier VM
Disk size	4,095 GB	4,095 GB
Maximum 8-KB IOPS per persistent disk	300	500
Maximum number of disks that perform the maximum IOPS	66	40

Premium unmanaged virtual machine disks: Per-account limits

Resource	Limit
Total disk capacity per account	35 TB
Total snapshot capacity per account	10 TB
Maximum bandwidth per account (ingress + egress)1	<=50 Gbps

¹Ingress refers to all data from requests that are sent to a storage account. Egress refers to all data from responses that are received from a storage account.

Premium unmanaged virtual machine disks: Per-disk limits

Premium storage disk type	P10	P20	P30	P40	P50
Disk size	128 GiB	512 GiB	1,024 GiB (1 TB)	2,048 GiB (2 TB)	4,095 GiB (4 TB)
Maximum IOPS per disk	500	2,300	5,000	7,500	7,500
Maximum throughput per disk	100 MB/sec	150 MB/sec	200 MB/sec	250 MB/sec	250 MB/sec
Maximum number of disks per storage account	280	70	35	17	8

Premium unmanaged virtual machine disks: Per-VM limits

Resource	Limit
Maximum IOPS per VM	80,000 IOPS with GS5 VM
Maximum throughput per VM	2,000 MB/sec with GS5 VM

StorSimple System limits

Limit identifier	Limit	Comments
Maximum number of storage account credentials	64
Maximum number of volume containers	64
Maximum number of volumes	255
Maximum number of schedules per bandwidth template	168	A schedule for every hour, every day of the week.
Maximum size of a tiered volume on physical devices	64 TB for StorSimple 8100 and StorSimple 8600	StorSimple 8100 and StorSimple 8600 are physical devices.
Maximum size of a tiered volume on virtual devices in Azure	30 TB for StorSimple 8010 64 TB for StorSimple 8020	StorSimple 8010 and StorSimple 8020 are virtual devices in Azure that use Standard storage and Premium storage, respectively.
Maximum size of a locally pinned volume on physical devices	9 TB for StorSimple 8100 24 TB for StorSimple 8600	StorSimple 8100 and StorSimple 8600 are physical devices.
Maximum number of iSCSI connections	512
Maximum number of iSCSI connections from initiators	512
Maximum number of access control records per device	64
Maximum number of volumes per backup policy	24
Maximum number of backups retained per backup policy	64
Maximum number of schedules per backup policy	10
Maximum number of snapshots of any type that can be retained per volume	256	This amount includes local snapshots and cloud snapshots.
Maximum number of snapshots that can be present in any device	10,000
Maximum number of volumes that can be processed in parallel for backup, restore, or clone	16	If there are more than 16 volumes, they're processed sequentially as processing slots become available. New backups of a cloned or a restored tiered volume can't occur until the operation is finished. For a local volume, backups are allowed after the volume is online.
Restore and clone recover time for tiered volumes	<2 minutes	The volume is made available within 2 minutes of a restore or clone operation, regardless of the volume size. The volume performance might initially be slower than normal as most of the data and metadata still resides in the cloud. Performance might increase as data flows from the cloud to the StorSimple device. The total time to download metadata depends on the allocated volume size. Metadata is automatically brought into the device in the background at the rate of 5 minutes per TB of allocated volume data. This rate might be affected by Internet bandwidth to the cloud. The restore or clone operation is complete when all the metadata is on the device. Backup operations can't be performed until the restore or clone operation is fully complete.
Restore recover time for locally pinned volumes	<2 minutes	The volume is made available within 2 minutes of the restore operation, regardless of the volume size. The volume performance might initially be slower than normal as most of the data and metadata still resides in the cloud. Performance might increase as data flows from the cloud to the StorSimple device. The total time to download metadata depends on the allocated volume size. Metadata is automatically brought into the device in the background at the rate of 5 minutes per TB of allocated volume data. This rate might be affected by Internet bandwidth to the cloud. Unlike tiered volumes, if there are locally pinned volumes, the volume data is also downloaded locally on the device. The restore operation is complete when all the volume data has been brought to the device. The restore operations might be long and the total time to complete the restore will depend on the size of the provisioned local volume, your Internet bandwidth, and the existing data on the device. Backup operations on the locally pinned volume are allowed while the restore operation is in progress.
Thin-restore availability	Last failover
Maximum client read/write throughput, when served from the SSD tier*	920/720 MB/sec with a single 10-gigabit Ethernet network interface	Up to two times with MPIO and two network interfaces.
Maximum client read/write throughput, when served from the HDD tier*	120/250 MB/sec
Maximum client read/write throughput, when served from the cloud tier*	11/41 MB/sec	Read throughput depends on clients generating and maintaining sufficient I/O queue depth.

*Maximum throughput per I/O type was measured with 100 percent read and 100 percent write scenarios. Actual throughput might be lower and depends on I/O mix and network conditions.

Stream Analytics limits

---

Limit identifier	Limit	Comments
Maximum number of streaming units per subscription per region	83	To request an increase in streaming units for your subscription beyond 83, contact Microsoft Support.
Maximum number of inputs per job	60	There's a hard limit of 60 inputs per Azure Stream Analytics job.
Maximum number of outputs per job	60	There's a hard limit of 60 outputs per Stream Analytics job.
Maximum number of functions per job	60	There's a hard limit of 60 functions per Stream Analytics job.
Maximum number of streaming units per job	66	There's a hard limit of 66 streaming units per Stream Analytics job.
Maximum number of jobs per region	1,500	Each subscription can have up to 1,500 jobs per geographical region.
Reference data blob MB	5 GB	Up to 5 GB when using 1 or more SUs.
Maximum number of characters in a query	512000	There's a hard limit of 512k characters in an Azure Stream Analytics job query.

Virtual Machines limits

Virtual Machines limits

Resource	Limit
Virtual machines per cloud service 1	50
Input endpoints per cloud service 2	150

¹ Virtual machines created by using the classic deployment model instead of Azure Resource Manager are automatically stored in a cloud service. You can add more virtual machines to that cloud service for load balancing and availability.

² Input endpoints allow communications to a virtual machine from outside the virtual machine's cloud service. Virtual machines in the same cloud service or virtual network can automatically communicate with each other.

Virtual Machines limits - Azure Resource Manager

The following limits apply when you use Azure Resource Manager and Azure resource groups.

Resource	Limit
VMs per subscription	25,0001 per region.
VM total cores per subscription	201 per region. Contact support to increase limit.
Azure Spot VM total cores per subscription	201 per region. Contact support to increase limit.
VM per series, such as Dv2 and F, cores per subscription	201 per region. Contact support to increase limit.
Availability sets per subscription	2,500 per region.
Virtual machines per availability set	200
Proximity placement groups per resource group	800
Certificates per availability set	1992
Certificates per subscription	Unlimited3

¹ Default limits vary by offer category type, such as Free Trial and Pay-As-You-Go, and by series, such as Dv2, F, and G. For example, the default for Enterprise Agreement subscriptions is 350. For security, subscriptions default to 20 cores to prevent large core deployments. If you need more cores, submit a support ticket.

² Properties such as SSH public keys are also pushed as certificates and count towards this limit. To bypass this limit, use the Azure Key Vault extension for Windows or the Azure Key Vault extension for Linux to install certificates.

³ With Azure Resource Manager, certificates are stored in the Azure Key Vault. The number of certificates is unlimited for a subscription. There's a 1-MB limit of certificates per deployment, which consists of either a single VM or an availability set.

Note

Virtual machine cores have a regional total limit. They also have a limit for regional per-size series, such as Dv2 and F. These limits are separately enforced. For example, consider a subscription with a US East total VM core limit of 30, an A series core limit of 30, and a D series core limit of 30. This subscription can deploy 30 A1 VMs, or 30 D1 VMs, or a combination of the two not to exceed a total of 30 cores. An example of a combination is 10 A1 VMs and 20 D1 VMs.

Compute Gallery limits

There are limits, per subscription, for deploying resources using Compute Galleries:

• 100 compute galleries, per subscription, per region
• 1,000 image definitions, per subscription, per region
• 10,000 image versions, per subscription, per region

Managed Run Command limit

The maximum number of allowed Managed Run Commands is currently limited to 25.

Virtual Machine Scale Sets limits

Resource	Limit
Maximum number of VMs in a scale set	1,000
Maximum number of VMs based on a custom VM image in a scale set	600
Maximum number of scale sets per subscription per region	2,500
Maximum number of nodes supported in VMSS for IB cluster	100

Virtual Network Manager limits

Category	Limitation
General Limitations
Cross-tenant Support	Only with static membership network groups
Azure Subscriptions	Policy application limited to < 15,000 subscriptions
Policy Enforcement Mode	No addition to network group if set to Disabled
Policy Evaluation Cycle	Standard evaluation cycle not supported
Subscription Movement	Moving subscription to another tenant not supported
Limits for Connectivity Configurations
Virtual Networks in a Connected Group	A connected group can include up to 250 VNets by default, expandable to 1000 upon request using this form.
Private Endpoints	1000 private endpoints per connected group
Hub-and-Spoke Configuration	Max 1000 virtual networks peered to the hub
Direct Connectivity	Up to 250 VNets by default, expandable to 1000 upon request using this form.
Group Membership	A virtual network can be part of up to two connected groups, expandable to 1000 upon request using this form.
Overlapping IP Spaces	Communication to overlapped IP address is dropped
Limits for Security Admin Rules
IP Prefixes	Max 1,000 IP prefixes combined
Admin Rules	Max 100 admin rules at one level
Limits for User Defined Routes
User Defined Routes per Route Table	Max 1,000

Dev tunnels limits

The following limits apply to dev tunnels. The limits reset monthly.

Resource	Limit
Bandwidth	5 GB per user
Tunnels	10 per user
Active connections	1000 per port
Ports	10 per tunnel
HTTP request rate	1500/min per port
Data transfer rate	Up to 20 MB/s per tunnel
Max web-forwarding HTTP request body size	16 MB

For questions on these limits, open an issue in our GitHub repo.

Network Security Perimeters limits

Scale limitations

Network security perimeter functionality can be used to support deployments of PaaS resources with common public network controls with following scale limitations:

Limitation	Description
Number of network security perimeters	Supported up to 100 as recommended limit per subscription.
Profiles per network security perimeters	Supported up to 200 as recommended limit.
Number of rule elements per profile	Supported up to 200 as hard limit.
Number of PaaS resources across subscriptions associated with the same network security perimeter	Supported up to 1000 as recommended limit.

Other limitations

Network security perimeter has other limitations as follows:

Limitation/Issue	Description
Resource group move operation cannot be performed if multiple network security perimeters are present	If there are multiple network security perimeters present in the same resource group, then the network security perimeter cannot be moved across resource groups/subscriptions.
Associations must be removed before deleting network security perimeter	Forced delete option is currently unavailable. Thus all associations must be removed before deleting a network security perimeter. Only remove associations after taking precautions for allowing access previously controlled by network security perimeter.
Resource names cannot be longer than 44 characters to support network security perimeter	The network security perimeter resource association created from the Azure portal has the format {resourceName}-{perimeter-guid}. To align with the requirement name field can't have more than 80 characters, resources names would have to be limited to 44 characters.
Service endpoint traffic is not supported.	It's recommended to use private endpoints for IaaS to PaaS communication. Currently, service endpoint traffic can be denied even when an inbound rule allows 0.0.0.0/0.

Note

Refer to individual PaaS documentation for respective limitations for each service.

See also

• Understand Azure limits and increases
• Virtual machine and cloud service sizes for Azure
• Sizes for Azure Cloud Services
• Naming rules and restrictions for Azure resources