Maybe this will help...   Microsoft Office/Outlook can only integrate with one messaging application.  Messaging applications integrate with Office by updating the DefaultIMApp registry key.  Jabber updates/checks this registry key at install and whe...

Similar doc for CUCM. https://supportforums.cisco.com/document/65651/communications-manager-rtmt-trace-locations-cli

Should also note.  This process only exports and adds contacts.  It does not update or delete them.