You have recently upgraded as follows:

From:

Cisco Unified Communications Manager Release 5.x
Cisco Unified Presence Release 1.x

To:

Cisco Unified Communications Manager Release 6.x
Cisco Unified Presence Release 6.x

Which feature is not found in the later releases?

A.
server redundancy

B.
SIP PUBLISH trunk

C.
calendaring via Microsoft Exchange

D.
adjunct licensing

E.
line appearance by user definition