All outgoing calls are being dropped after about 10 seconds of silence with Q.850 ;cause=22 being returned to the SBC and the following error displayed to the user:
It only happens in one of our offices if the same account logs into a machine in a different office it's fine and it never occurs on the WebClient only the desktop client.
Anyone seen this before?
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In case anyone comes across this post in future, it turned out to be a firewall issue whereby one of the MSFT servers was blocked, but this did not affect the regular Teams usage at all only PSTN it also didn't effect the Teams web client