DND and receptionist BLF

[ITinvestor]

Hello,

Is there a way to set all employees phones so that when they are away from their desk they are able to hit the DND key on their phone, and the Receptionist knows they are away from their desk because their BLF speed dial turns from solid green to red? Then when they come back and hit DND again it takes it turns from solid red to green on the receptionist phone.