I have a customer who has CUCM/Unity and is purchasing OCS/UM because of its Presense features. Both OCS and Unity will share the same Exchange 2007 cluster. My question is: When a user 1 on CUCM leaves a VM in a OCS UM mailbox (exchange 2007) and the OCS user wants to replay to the CUCM user. Does the UM request stay within the Exchange Environment? Since Msft UM does not support VPIM nor Cisco Unity integrate directly with OCS. Forwarding the VM should work fine.
I appreciate any feedback which is provided.