Region configured (None) != region detected

[sandernaus]

• azure-identity:
• 1.21.0:
• Linux (Azure Function App):
• Python 3.10:

Describe the bug
Using the azure-identity package to retrieve a token for different services (e.g. Graph) results in a warning: Region configured (None) != region detected

This is caused by the latest release of the MSAL Python Package (1.32.0).

Forcing to use an older version (e.g. 1.31.0) of the MSAL package in the Azure Function requirements.txt can be used as a workaround.

To Reproduce
Steps to reproduce the behavior:

1. Deploy Python code to fetch a token to Azure Function App
2. Run the function
3. Warning is shown in the logs

from azure.identity import ClientSecretCredential

sp_credentials = ClientSecretCredential(
    tenant_id="x",
    client_id="x",
    client_secret="x",

access_token = sp_credentials.get_token("2ff814a6-3304-4ab8-85cb-cd0e6f879c1d/.default")

Expected behavior
Parameter to pass the region or to disable auto detection is properly passed as parameter when calling classes from the MSAL package.

[github-actions]

Hello @sandernaus. I'm an AI assistant for the azure-sdk-for-python repository. I have some suggestions that you can try out while the team gets back to you.

• The warning is known to occur with the new MSAL Python package (v1.32.0) causing auto-detection of region to flag a mismatch when no region is explicitly configured.
• As a temporary workaround, we recommend pinning the MSAL package to an earlier version (e.g. v1.31.0) in your requirements.txt for your Azure Function App.
• Consider checking for updates or filing a feature request so that a parameter to pass the region or disable auto-detection is added to the MSAL/azure-identity integration.
• For additional context, refer to the discussion in this issue.

The team will get back to you shortly, hopefully this helps in the meantime.

[xiangyan99]

Given this is a change caused by MSAL, please open issue in https://github.com/AzureAD/microsoft-authentication-library-for-python repo.