There are 4 sites and each site has Unity 5 "Unified" connecting back to 2 Communications Managers "version 6". Each site has their own Exchange server but all are under the same forest. When user A leaves a message for User B in location B, it will say "Message from John Doe 1111" in Outlook.
If user A "John Doe" leaves a message for User C in a different location, it will say "Message from Unidentified Caller 1111". This only happens on that specific location, all other locations work fine. If user C leaves a message for someone in that location, it will say "Message from User C, 2222". (It works internally)
Each site is connecting back using digital networking. Each Unity server knows about each other. We have compared settings on each Unity server and nothing is different that would make this happen. I have read the digital networking guide and it says "When a subscriber places a phone call to another subscriber who is associated with a different Cisco Unity server, and the call is forwarded to voice mail, Cisco Unity cannot identify who left the message. That is, identified subscriber messaging does not work, and instead, the message is handled as though it came from an unidentified caller.
Well this does not make sense because the other sites can receive the caller name in email but this one site cannot. Has anyone ran into this before? Any help is appreciated.