By default, when Cisco Unity voice mailbox subscribers (using Cisco Unity on Microsoft Exchange)
have exceeded the “prohibit send and receive” setting of their mailbox size, where does a
message from an unidentified caller go?

A.
nowhere (It is deleted.)

B.
the subscriber’s mailbox, but it is unavailable until some messages are deleted

C.
the subscriber’s mailbox, with warning

D.
the system administrator mailbox

E.
the Unaddressed Messages distribution list