Access SignalR Service with AAD auth options started to fail after several months

[enijburg]

We have a couple .netcore applications connected to signalr services through aad auth. Last week the clients that connect to the negotiated endpoint get 401 errors. If I change the AddAzureSignalR connection string from the "Endpoint=https://nnn.service.signalr.net;AuthType=aad;" to the Primary connectionstring from Keys in azure portal everything works again. Did something change related to AAD auth?

Thanks in advance.

Azure/azure-signalr#1243

[terencefan]

Hello, @enijburg when did this happen? And what type of managed identity you are using now?

• System assigned
• User assigned

[terencefan]

Would you mind tell me in which region you tested your service as well?

[enijburg]

Hi @terencefan, our services run in west europe and north europe. We assign User assigned managed identities through IAM role assignments from deployment pipeline (SignalR App Server (Preview) role)