We are still considering the Voicemail on Busy feature for future releases, and will continue to update the status when it changes.
Note: The Busy on Busy feature has been released. Please see the following documentation for admin details:
Thanks for providing this feedback. This feature is on the backlog. We’ll update when we have more details to share.
An error occurred while saving the commentPeter Holland commented
looks like this might have been completed https://docs.microsoft.com/en-us/MicrosoftTeams/rooms/rooms-authentication