If you are just wanting to use the exchange directory for the corporate directory on the IP phones. I think you can accomplish this by writing your on xml document to do the corporate directory queries. If you are wanting to integrate callmanager with the exchange directory for authentication and authorization for all callmanager processes this is not possible at this time. We only support integrating with Microsoft AD, Netscape Directory, and the embedded DCDirectory.
Thank you,
-Mckee
