Calls do not complete, a 404 Not Found error message is returned.
This response indicates that the user does not exist at the domain specified in the Request-URI.
The destination is unreachable because the number is either not allocated, or it is incorrectly defined or formatted.
A common reason for this behaviour is due to the credentials on the Teams user's profile not matching those on the PBX/Trunk.
Check the affected user's credentials and try again.