I have an extension on a CM 6.1 cluster with Call Forward all via PSTN to another location which has a CM 4.0(2) cluster with Voice Mail. When the call is forwarded from the 6.x to the 4.x the users VM does not pick up but the generic Unity menu comes up.
If I place calls from the 6.1 extension manually to the 4.0(2) extension I get the users Voice Mail. Also if I call from a Cell Phone directly to the extension on 4.0(2)the calls goes to the users voicemail.
The issue is only when I am call forwarding from 6.x to 4.x.