You have received a trouble ticket stating that the MWI light is not coming on for a group of users. Further investigation reveals that the affected users are connected to the same subscriber in the cluster. Users that are connected to other subscribers in the same cluster are not experiencing this issue.What is causing this problem?

A.
The MWI numbers for this subscriber have been changed.

B.
The Cisco Unity voice-mail services need to be restarted for the subscriber so all the users will receive proper MWI message indication.

C.
Database replication has an error or has failed.

D.
The voice-mail ports assigned to the subscriber are down.