Quick question hopefully,
The exchange server was moved to another location and only thing that changed was the IP addresses. Unity is in old location still and voicemails can be left with no problem, but when people log in to check VM over phone they sign in to their mailbox and after hitting # on password prompt it is dead silent. It is still silent after 4 minutes of the call being up.
There appears to be no errors in the event log at time people check messages, etc. There is about a 900ms round trip time between the unity and exchange server now. That is the only difference I can see. We're looking into the WAN and MPLS now to see if we can the round trip time down.