A customer with two Cisco Unity servers has had a catastrophic failure on one those servers. They have a DiRT disaster recovery backup and want to restore the database of their failed Cisco Unity server to their functioning Cisco Unity server. What do they need to know?

A.
This will work only if the database does not exceed 7500 subscribers.

B.
This will work if the Microsoft Exchange Server aliases are unique.

C.
The DiRT backup can only be restored to a Cisco Unity installation with a default database.

D.
The SQL database of the functioning server needs to be combined with the DiRT backup from the failed server.