Call Screening causes the system to prompt inbound callers for their name before routing the call. The system then calls you and replays the caller's recorded name when you answer. If you accept the call, you are connected to the caller. If you do not accept the call, it is routed to voicemail. The caller hears music-on-hold until they are either connected to you or your voicemail.
You can individually enable or disable Call Screening for each Presence state.
Call Screening is not available for the DO NOT DISTURB Presence state.