Which Cisco Unified Communications Manager configuration causes an IP phone screen to
display a “registration rejected” message?

A.
Cisco Unified Communications Manager is unable to reach user IP phone.

B.
Cisco Unified Communications Manager database replication status is 2.

C.
Cisco Unified Communications Manager auto registration is disabled.

D.
Cisco Unified Communications Manager is unable to allocate DN.

E.
Cisco Unified Communications Manager subscriber is offline.