Your company uses Teams. A user reports that when they manually decline a Teams call, the call is NOT sent to their Teams voicemail. Which setting should you configure?

The 'Busy on busy when in a call' setting directly controls how incoming calls are handled when a user is already engaged or manually declines a call. Configuring this setting to 'send to voicemail' ensures that any declined call is correctly routed to the user's voicemail service.

Managing delegates allows other users to answer or make calls on the user's behalf, which is unrelated to what happens when a call is manually declined by the user.

The 'Forward my calls' setting explicitly directs all incoming calls to another destination, not specifically the behavior when a call is actively declined by the user.

'Calls ring me' determines how long the call rings the user before other routing options are applied, but it does not specify the action for a manually declined call.