Additional meeting and call-related features and issues within Microsoft Teams for business
The devices are NOT available whilst the audio driver is crashed out. The only thing that fixes the issue is troubleshooting the sound driver and forcing Windows to reload it. Not much use when users aren't local administrator of their machines.
How can someone select a device if no devices are available and the audio selection screen is greyed out?
I don't think you are having the same issue that some of us are having.