Set-MalwareFilterPolicy
This cmdlet is available in on-premises Exchange and in the cloud-based service. Some parameters and settings may be exclusive to one environment or the other.
Use the Set-MalwareFilterPolicy cmdlet to modify malware filter policies in your organization.
For information about the parameter sets in the Syntax section below, see Exchange cmdlet syntax.
Syntax
Set-MalwareFilterPolicy
[-Identity] <MalwareFilterPolicyIdParameter>
[-Action <MalwareFilteringAction>]
[-AdminDisplayName <String>]
[-BypassInboundMessages <Boolean>]
[-BypassOutboundMessages <Boolean>]
[-Confirm]
[-CustomAlertText <String>]
[-CustomExternalBody <String>]
[-CustomExternalSubject <String>]
[-CustomFromAddress <SmtpAddress>]
[-CustomFromName <String>]
[-CustomInternalBody <String>]
[-CustomInternalSubject <String>]
[-CustomNotifications <Boolean>]
[-DomainController <Fqdn>]
[-EnableExternalSenderAdminNotifications <Boolean>]
[-EnableExternalSenderNotifications <Boolean>]
[-EnableFileFilter <Boolean>]
[-EnableInternalSenderAdminNotifications <Boolean>]
[-EnableInternalSenderNotifications <Boolean>]
[-ExternalSenderAdminAddress <SmtpAddress>]
[-FileTypeAction <FileTypeFilteringAction>]
[-FileTypes <String[]>]
[-InternalSenderAdminAddress <SmtpAddress>]
[-IsPolicyOverrideApplied <Boolean>]
[-MakeDefault]
[-QuarantineTag <String>]
[-WhatIf]
[-ZapEnabled <Boolean>]
[<CommonParameters>] Description
You need to be assigned permissions before you can run this cmdlet. Although this topic lists all parameters for the cmdlet, you may not have access to some parameters if they're not included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see Find the permissions required to run any Exchange cmdlet.
Examples
Example 1
Set-MalwareFilterPolicy -Identity "Contoso Malware Filter Policy" -Action DeleteMessage -EnableInternalSenderAdminNotifications $true -InternalSenderAdminAddress admin@contoso.comIn on-premises Exchange, this example modifies the malware filter policy named Contoso Malware Filter Policy with the following settings:
- Delete messages that contain malware.
- Don't notify the message sender when malware is detected in the message.
- Notify the administrator admin@contoso.com when malware is detected in a message from an internal sender.
Example 2
$FileTypesAdd = Get-MalwareFilterPolicy -Identity Default | select -Expand FileTypes
$FileTypesAdd += "dgz","mde"
Set-MalwareFilterPolicy -Identity Default -EnableFileFilter $true -FileTypes $FileTypesAddThis example enables the common attachments filter in the malware filter policy named Default and adds the file types "dgz" and "mde" without affecting the other file type entries.
Example 3
$ft = Get-MalwareFilterPolicy -Identity Default
$a = [System.Collections.ArrayList]($ft.FileTypes)
$a
$a.RemoveAt(6)
Set-MalwareFilterPolicy -Identity Default -FileTypes $aThis example modifies the malware filter policy named Default by removing an existing file type from the common attachments filter without affecting other file types that are already specified.
The first three commands return the existing list of file types. The first file type in the list has the index number 0, the second has the index number 1, and so on. Use the index number to specify the file type that you want to remove.
The last two commands remove the seventh file type that's displayed in the list.
Parameters
-Action
This parameter is available only in on-premises Exchange.
The Action parameter specifies the action to take when malware is detected in a message. Valid values are:
- DeleteMessage: Handles the message without notifying the recipients. This is the default value.
- DeleteAttachmentAndUseDefaultAlert: Delivers the message, but replaces all attachments with a file named Malware Alert Text.txt that contains the default alert text.
- DeleteAttachmentAndUseCustomAlert: Delivers the message, but replaces all attachments with a file named Malware Alert Text.txt that contains the custom alert text specified by the CustomAlertText parameter.
| Type: | MalwareFilteringAction |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019 |
-AdminDisplayName
The AdminDisplayName parameter specifies a description for the policy. If the value contains spaces, enclose the value in quotation marks (").
| Type: | String |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-BypassInboundMessages
This parameter is available only in on-premises Exchange.
The BypassInboundMessages parameter enables or disables malware filtering on incoming messages (messages entering the organization). Valid values are:
- $true: Malware filtering is disabled on inbound messages.
- $false: Malware filtering is enabled on inbound messages. This is the default value.
| Type: | Boolean |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019 |
-BypassOutboundMessages
This parameter is available only in on-premises Exchange.
The BypassOutboundMessages parameter enables or disables malware filtering on outgoing messages (messages leaving the organization). Valid values are:
- $true: Malware filtering is disabled on outbound messages.
- $false: Malware filtering is enabled on outbound messages. This is the default value.
| Type: | Boolean |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019 |
-Confirm
The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on if the cmdlet requires confirmation before proceeding.
- Destructive cmdlets (for example, Remove-* cmdlets) have a built-in pause that forces you to acknowledge the command before proceeding. For these cmdlets, you can skip the confirmation prompt by using this exact syntax:
-Confirm:$false. - Most other cmdlets (for example, New-* and Set-* cmdlets) don't have a built-in pause. For these cmdlets, specifying the Confirm switch without a value introduces a pause that forces you acknowledge the command before proceeding.
| Type: | SwitchParameter |
| Aliases: | cf |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-CustomAlertText
This parameter is available only in on-premises Exchange.
The CustomAlertText parameter specifies the custom text to use in the replacement attachment named Malware Alert Text.txt. If the value contains spaces, enclose the value in quotation marks (").
This parameter is meaningful only when the value of the Action parameter is DeleteAttachmentAndUseCustomAlert.
| Type: | String |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019 |
-CustomExternalBody
The CustomExternalBody parameter specifies the custom body to use in notification messages for malware detections in messages from external senders. If the value contains spaces, enclose the value in quotation marks (").
This parameter is meaningful only when the value of the CustomNotifications parameter is $true, and the value of at least one of the following parameters is also $true:
- EnableExternalSenderAdminNotifications
- EnableExternalSenderNotifications
| Type: | String |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-CustomExternalSubject
The CustomExternalSubject parameter specifies the custom subject to use in notification messages for malware detections in messages from external senders. If the value contains spaces, enclose the value in quotation marks (").
This parameter is meaningful only when the value of the CustomNotifications parameter is $true, and the value of at least one of the following parameters is also $true:
- EnableExternalSenderAdminNotifications
- EnableExternalSenderNotifications
| Type: | String |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-CustomFromAddress
The CustomFromAddress parameter specifies the custom From address to use in notification messages for malware detections in messages from internal or external senders.
This parameter is meaningful only when the value of the CustomNotifications parameter is $true, and the value of at least one of the following parameters is also $true:
- EnableExternalSenderAdminNotifications
- EnableExternalSenderNotifications
- EnableInternalSenderAdminNotifications
- EnableInternalSenderNotifications
| Type: | SmtpAddress |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-CustomFromName
The CustomFromName parameter specifies the custom From name to use in notification messages for malware detections in messages from internal or external senders. If the value contains spaces, enclose the value in quotation marks (").
This parameter is meaningful only when the value of the CustomNotifications parameter is $true, and the value of at least one of the following parameters is also $true:
- EnableExternalSenderAdminNotifications
- EnableExternalSenderNotifications
- EnableInternalSenderAdminNotifications
- EnableInternalSenderNotifications
| Type: | String |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-CustomInternalBody
The CustomInternalBody parameter specifies the custom body to use in notification messages for malware detections in messages from internal senders. If the value contains spaces, enclose the value in quotation marks (").
This parameter is meaningful only when the value of the CustomNotifications parameter is $true, and the value of at least one of the following parameters is also $true:
- EnableInternalSenderAdminNotifications
- EnableInternalSenderNotifications
| Type: | String |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-CustomInternalSubject
The CustomInternalSubject parameter specifies the custom subject to use in notification messages for malware detections in messages from internal senders. If the value contains spaces, enclose the value in quotation marks (").
This parameter is meaningful only when the value of the CustomNotifications parameter is $true, and the value of at least one of the following parameters is also $true:
- EnableInternalSenderAdminNotifications
- EnableInternalSenderNotifications
| Type: | String |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-CustomNotifications
The CustomNotifications parameter enables or disables the customization of notification messages for malware detections. Valid values are:
- $true: Replace the default values used in notification messages with the values of the CustomFromAddress, CustomFromName, CustomExternalSubject, CustomExternalBody, CustomInternalSubject and CustomInternalBody parameters.
- $false: No customization is done to notification messages. The default values are used.
This parameter is meaningful only when the value of at least one of the following parameters is also $true:
- EnableExternalSenderAdminNotifications
- EnableExternalSenderNotifications
- EnableInternalSenderAdminNotifications
- EnableInternalSenderNotifications
| Type: | Boolean |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-DomainController
This parameter is available only in on-premises Exchange.
The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name (FQDN). For example, dc01.contoso.com.
| Type: | Fqdn |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019 |
-EnableExternalSenderAdminNotifications
The EnableExternalSenderAdminNotifications parameter enables or disables sending notification messages to an administrator for malware detections in messages from internal senders. Valid values are:
- $true: When malware attachments are detected in messages from external senders, a notification messages is sent to the email address that's specified by the ExternalSenderAdminAddress parameter.
- $false: Notifications aren't sent for malware attachment detections in messages from external senders. This is the default value.
Note: Admin notifications are sent only for attachments that are classified as malware.
| Type: | Boolean |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-EnableExternalSenderNotifications
This parameter is available only in on-premises Exchange.
The EnableExternalSenderNotifications parameter enables or disables sending notification messages to external senders for malware detections in their messages. Valid values are:
- $true: When malware is detected in a message from an external sender, send them a notification message.
- $false: Don't send malware detection notification messages to external message senders. This is the default value.
| Type: | Boolean |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019 |
-EnableFileFilter
This parameter is available only in the cloud-based service.
The EnableFileFilter parameter enables or disables the common attachments filter (also known as common attachment blocking). Valid values are:
- $true: The common attachments filter is enabled. This is the default value.
- $false: The common attachments filter is disabled.
You specify the file types using the FileTypes parameter.
You specify the action for detected files using the FileTypeAction parameter.
| Type: | Boolean |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Online, Exchange Online Protection |
-EnableInternalSenderAdminNotifications
The EnableInternalSenderAdminNotifications parameter enables or disables sending notification messages to an administrator for malware detections in messages from internal senders. Valid values are:
- $true: When malware attachments are detected in messages from internal senders, a notification messages is sent to the email address that's specified by the InternalSenderAdminAddress parameter.
- $false: Notifications aren't sent for malware attachment detections in messages from internal senders. This is the default value.
Note: Admin notifications are sent only for attachments that are classified as malware.
| Type: | Boolean |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-EnableInternalSenderNotifications
This parameter is available only in on-premises Exchange.
The EnableInternalSenderNotifications parameter enables or disables sending notification messages to internal senders for malware detections in their messages. Valid values are:
- $true: When malware is detected in a message from an internal sender, send them a notification message.
- $false: Don't send malware detection notification messages to internal message senders. This is the default value.
| Type: | Boolean |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019 |
-ExternalSenderAdminAddress
The ExternalSenderAdminAddress parameter specifies the email address of the administrator who receives notifications messages for malware detections in messages from external senders.
This parameter is meaningful only if the value of the EnableExternalSenderAdminNotifications parameter is $true.
| Type: | SmtpAddress |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-FileTypeAction
This parameter is available only in the cloud-based service.
The FileTypeAction parameter specifies what happens to messages that contain one or more attachments where the file extension is included in the FileTypes parameter (the common attachments filter). Valid values are:
- Quarantine: Quarantine the message. Whether or not the recipient is notified depends on the quarantine notification settings in the quarantine policy that's selected for the malware filter policy by the QuarantineTag parameter.
- Reject: The message is rejected in a non-delivery report (also known as an NDR or bounce message) to the sender. The message is not available in quarantine. This is the default value.
This parameter is meaningful only when the value of the EnableFileFilter parameter is $true.
| Type: | FileTypeFilteringAction |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Online, Exchange Online Protection |
-FileTypes
This parameter is available only in the cloud-based service.
The FileTypes parameter specifies the file types that are automatically blocked by the common attachments filter, regardless of content. The default values are:
ace, ani, apk, app, appx, arj, bat, cab, cmd, com, deb, dex, dll, docm, elf, exe, hta, img, iso, jar, jnlp, kext, lha, lib, library, lnk, lzh, macho, msc, msi, msix, msp, mst, pif, ppa, ppam, reg, rev, scf, scr, sct, sys, uif, vb, vbe, vbs, vxd, wsc, wsf, wsh, xll, xz, z
This parameter is meaningful only if the value of the EnableFileFilter parameter is $true.
The common attachments filter uses best effort true-typing to detect the file type regardless of the file name extension. For example, an exe file renamed to txt is detected as an exe file. If true-typing fails or isn't supported for the specified file type, then extension matching is used.
To replace the existing list of file types with the values you specify, use the syntax FileType1,FileType2,...FileTypeN. To preserve existing values, be sure to include the file types that you want to keep along with the new values that you want to add.
To add or remove file types without affecting the other file type entries, see the Examples section in this topic.
| Type: | String[] |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Online, Exchange Online Protection |
-Identity
The Identity parameter specifies the malware filter policy you want to modify. You can use any value that uniquely identifies the policy. For example:
- Name
- Distinguished name (DN)
- GUID
| Type: | MalwareFilterPolicyIdParameter |
| Position: | 1 |
| Default value: | None |
| Required: | True |
| Accept pipeline input: | True |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-InternalSenderAdminAddress
The InternalSenderAdminAddress parameter specifies the email address of the administrator who receives notifications messages for malware detections in messages from internal senders.
This parameter is meaningful only if the value of the EnableInternalSenderAdminNotifications parameter is $true.
| Type: | SmtpAddress |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-IsPolicyOverrideApplied
This parameter is reserved for internal Microsoft use.
| Type: | Boolean |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Online, Exchange Online Protection |
-MakeDefault
The MakeDefault switch makes this malware filter policy the default policy. You don't need to specify a value with this switch.
The default malware filter policy has no recipient filters (is applied to everyone) and has the Priority value Lowest.
| Type: | SwitchParameter |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-QuarantineTag
This parameter is available only in the cloud-based service.
The QuarantineTag parameter specifies the quarantine policy that's used on messages that are quarantined as malware. You can use any value that uniquely identifies the quarantine policy. For example:
- Name
- Distinguished name (DN)
- GUID
Quarantine policies define what users are able to do to quarantined messages, and whether users receive quarantine notifications. For more information about quarantine policies, see Quarantine policies.
The default quarantine policy that's used is named AdminOnlyAccessPolicy. For more information about this quarantine policy, see Anatomy of a quarantine policy.
To view the list of available quarantine policies, run the following command: Get-QuarantinePolicy | Format-List Name,EndUser*,ESNEnabled.
| Type: | String |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Online, Exchange Online Protection |
-WhatIf
The WhatIf switch simulates the actions of the command. You can use this switch to view the changes that would occur without actually applying those changes. You don't need to specify a value with this switch.
| Type: | SwitchParameter |
| Aliases: | wi |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online, Exchange Online Protection |
-ZapEnabled
This parameter is available only in the cloud-based service.
The ZapEnabled parameter enables or disables zero-hour auto purge (ZAP) for malware in cloud mailboxes. ZAP detects malware in unread messages that have already been delivered to the user's Inbox. Valid values are:
- $true: ZAP for malware is enabled. This is the default value. In Exchange Server, unread messages in the user's Inbox that contain malware are moved to the Junk Email folder. In the cloud-based service, the messages are quarantined.
- $false: ZAP for malware is disabled.
| Type: | Boolean |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
| Applies to: | Exchange Online, Exchange Online Protection |
Inputs
Input types
To see the input types that this cmdlet accepts, see Cmdlet Input and Output Types. If the Input Type field for a cmdlet is blank, the cmdlet doesn't accept input data.
Outputs
Output types
To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types. If the Output Type field is blank, the cmdlet doesn't return data.