A user often visits two different offices and has an extension at both offices. Each office has a different PBX system with different UM dial plans.
What is the correct way for an administrator to allow the user to receive voice mail to calls received at either office?
A. Configure the user account so that a secondary dial plan and telephone extension is specified.
B. Set up the PBX system so that instead of sending calls to voice mail the call is forwarded to the other office extension.
C. Request the user contact the helpdesk when arriving at each office so that the dial plan can be altered.
D. Assign the additional extension to the UM mailbox.