Access Azure Table Storage from Visual Studio with AzureDefaultCredential

Question

I'm trying to access a table in Azure Table Storage using AzureDefaultCredential.

In Visual Studio, I am logged in with my AAD account

In Table Storage -> IAM -> Role Assignments, my user has Owner, Contributor, Storage Account Contributor, Storage Blob Contributor, Storage Table Data Contributor (and others but think these should cover it! So many added to try and track down the issue)

In Storage Account -> Networking, Access is 'Enabled from all networks'

My code to create the client:

TableServiceClient tableServiceClient = new(

new Uri($"https://{_settings.SANAME}.table.core.windows.net"),

new DefaultAzureCredential());

The error message:
Status: 403 (Forbidden)

ErrorCode: AuthorizationPermissionMismatch

Content:

{"odata.error":{"code":"AuthorizationPermissionMismatch","message":{"lang":"en-US","value":"This request is not authorized to perform this operation using this permission.\nRequestId: REDACTED

\nTime:2024-11-07T14:24:23.8383582Z"}}}

I don't know what other permissions to apply! Any help, greatly appreciated

Answer 1

Hello Chris and community

To sum up

Issue - Using AzureDefaultcredential getting 403 error connecting table of storage using visual studio

Resolution

As user had installed Azure Arc at some point and this was created a local Managed Identity. The ordering of the credential checks in DefaultAzureCredentialwas picking up on this to use, which was then failing.

Uninstalling Azure Connected Machine Agent from Programs and Features resolved the issue

Kindly accept if it woked

Thanks

deepanshu

Answer 2

Hello Chris , Welcome to MS Q&A

Ok , so what you can try accessing the table storage with the same credentials via the Azure CLI or Azure Storage Explorer to check if the permissions issue is isolated to your application code. For example, run the following in the Azure CLI to verify:

az storage table list --account-name <your-storage-account-name>

If this works, it’s likely an issue with how DefaultAzureCredential is picking up your credentials.

And if that case as Sometimes, DefaultAzureCredential can cache old tokens that no longer have the correct permissions. You can restart Visual Studio and re-authenticate, or try signing out and back into Azure via Visual Studio.

Please check and let us know if any questions

Kindly accept if it helps

Thanks
Deepanshu

Answer 3

Hi @Chris Crawshaw

Greeting! Welcome to Microsoft Q&A Forum. Thanks for posting your query here!

The error message AuthorizationPermissionMismatch indicates that the permissions assigned to AAD account are not sufficient to perform the requested operation on the Azure Table Storage.

However, since you have already mentioned that you have given the multiple roles to the user, including Storage Table Data Contributor.

In your storage account check if you have below roles assigned, if not please assign the below roles from screen shot as well as add Storage Blob Data Contributor, Storage Queue Data Contributor and ``Storage Queue Data Reader roles.

If the above roles are already assigned, please make sure that roles are given at the Storage account level. These roles must be assigned to the specific storage account, not only at resource group level or subscription level.

Azure has azure-built-in-roles-for-blobs please follow the link and make you have the appropriate roles at storage account level.

Sometimes, changes in role assignments can take a few minutes to propagate. If you recently assigned roles, wait a bit and try again.

Also, ensure that Default to Microsoft Entra authorization is the Azure portal is set to Enabled at Storage account level. Portal>>Storage account>>Configurations>>Default to Microsoft Entra authorization is the Azure portal>>Enable.

Since you mentioned that access is enabled from all networks, ensure that there are no additional network restrictions that might be affecting access.

As an additional troubleshooting step, try accessing the Table Storage using a service principal. Create a service principal in Azure AD, assign the necessary roles, and use its credentials in your code.

1. Create a service principal and get its credentials (client ID, client secret, tenant ID).
2. Assign the Storage Table Data Contributor role to the service principal.
3. Update your code to use ClientSecretCredential:

AzureDefaultCredential by itself isn't enough for programmatic authentication. You need an application (service principal) with owner permissions for the specified resource group. You should include the service principal details in your PowerShell REST API call to create resources in the resource group.

Hope this helps to resolve the AuthorizationPermissionMismatch error and successfully access Azure Table Storage using DefaultAzureCredential or a service principal. Even though if the issue persists, please feel free to contact, we will work closely for the resolution.

Please do consider to click on "Accept Answer" and "Up-vote" on the post that helps you, as it can be beneficial to other community members.

Answer 4

I had installed Azure Arc at some point and this was created a local Managed Identity. The ordering of the credential checks in DefaultAzureCredential was picking up on this to use, which was then failing.

Uninstalling Azure Connected Machine Agent from Programs and Features resolved the issue