We do run the GET call: https://graph.microsoft.com/v1.0/teams/711fc163-0408-4649-9a30-af65a5d30b52/channels
It used to return the channels just fine, but this week it suddenly starting failing with this error: { "error": { "code": "AccessDenied", "message": "Failed to execute Skype backend request GetThreadsS2SRequest.", "innerError": { "request-id": "226d8e17-fa0f-4c42-8139-4776e198a3b2", "date": "2019-08-26T19:25:10" } } }
We see that the problem is happening for different teams and across different tenants. This is critical!