Teams   Busy on busy during calls InboundPstnCallRoutingTreatment must be set to something other than "Use default settings" in order for BusyOnBusyEnabledType to be honored at all. The GUI "Let users decide" is the equivalent of the PowerShell "UserOverride" PS C:\> Get-CSTeamsCallingPolicy -Identity Global [Output edited to show pertinent information] Identity : Global BusyOnBusyEnabledType : UserOverride InboundPstnCallRoutingTreatment : UserOverride   How to stop Aftershokz / Shokz headphones from beeping while muted Source While Teams is muted, hold both VOLUME buttons (volume "+" and "-" at the same time) for about 3 seconds. You will hear MUTE OFF.