Busy on Busy as an end user option
Busy on Busy should be made available as an end user option. Best way is to be able to enforce it by policy, deny it by policy or let the user choose for himself by policy.
From our point of view this is a local user setting because every user has its own opinion in mind how she/he want to be informed/disturbed via secondary incomming phone/audio call.
Forcing this setting via policy is good but please add the value "UserOverride" OR "EnabledUserOverride" OR "DisabledUserOverride" to this feature/function.
See LiveCaptionsEnabledTypeForCalling OR AllowVoicemail for example.
Kathryn Roscoe commented
Or at least the option to decide how their busy calls are treated. E.g. send to voicemail