Unity 7.x, Exchange 2007, Active Directory 2008.
Client reports the following for their REMOTE CUPC/softphone clients:
Internal caller calls, gets ringback, can leave message. Message shows properly in both CUPC and e-mail application.
External caller calls, gets ringback, can leave message. Message does not show anywhere. CUPC and e-mail application does not show any indication of message.
User calls voicemail pilot point from CUPC . Receives a message that the messaging server is unavailable.
LOCAL/Headquarters Users work fine.