Which of the following statements is true about blind addressing in Cisco Unity Connection?

A.
Blind addressing is used when the voice-mail user at the remote system is unavailable.

B.
Spell-by-name is not available when blind addressing is used, because the destination user is unknown to the system.

C.
When blind addressing is used, the validity of the destination user is known to the originating voice-mail system before sending the message

D.
Blind addressing is only used when networking with Cisco Unity Express systems.

Explanation:
OK. StudentGuide Volume 2 Page 4-19
In blind addressing, Spell-by-name is not available because the destination user is unknown to the system.