what happens when a failed primary Cisco Unified Communications Manager comes back into service?

Which statement describes what happens when a failed primary Cisco Unified Communications
Manager comes back into service?

Which statement describes what happens when a failed primary Cisco Unified Communications
Manager comes back into service?

A.
Devices in that group automatically reregister with the primary Cisco Unified CM.

B.
The group automatically re-elects a new primary Cisco Unified CM when it is out of service, and
it rejoins the group as a member Cisco Unified CM.

C.
The primary Cisco Unified CM must be added manually back to the group.

D.
A new temporary region is created automatically to avoid conflicts until database
resynchronization finishes.

Explanation:



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