I'm upgrading our Call Manager 4.X environment to UCM 6.X.
Our current Unity / Exchange environment with no failover is:
Unity version = 4.0(4.0)
Exchange 2003 build 6944
Cisco Unity TSP version = 8.1(3)
I want to know if I can build a connection between our new UCM 6.X environment to our existing Unity environment and test that functionality WHILE leaving the current Call Manager 4.X to Unity environment in place.