Has anyone successfully configured BES for Exchange to work with Microsoft Office Communicator? I've followed the steps as outlined in the Blackberry and Microsoft documentation, but I'm seeing a Error 301 on the Blackberry device when attempting to log in to the Enterprise Messenger application. Also, I'm unable to log in to a Communicator Web Access client using the AJAX service as detailed in the troubleshooting decision tree in Blackberry KB05460.

Configuration Info:

BES for MS Exchange 4.1.4
Live Communication Server 2005 - patched w/ KB911996
Communicator Web Access Server - patched w/ KB915066
AJAX Service has been enabled Communicator Web Access