In a OCS 2007 R2 farm, I was able to get the Blackberry Communicator client working by adding a CWA for OCS 2007 R1 to the farm, and then have the BES talk to the CWA for OCS 2007 R1.
At the moment, our VOIP gateway only supports OCS 2007 R1. I was thinking of adding a OCS 2007 R1 server, and then have the VOIP gateway talk to it. Can I do this?
Any problems if our users are enabled and configured on the OCS 2007 R2 system?