Are many people using Teams Voice with Teams Auto Attendants and Call Queues without issue ?
I've setup a single attendant with a single call queue. The call queue has 3 agents - all test users that I can see via Team Viewer. I call the attendant and they all ring most of the time. Sometime I get the attendant welcome message followed by sorry we cannot connect you now please try again later.
If I make 5 or 6 calls I can get the message but do not know why, a lot of the time the call rings and one of the agents can answer.