Office Communicator - Notifications - Cannot Synchronize Address Book

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There are several knowledge base articles that have been published that address various causes and resolutions for the "Cannot Synchronize Address Book" issue in Microsoft Office Communicator 2007 including R2.

After trying those with no resolution another possible solution is to run the Office Communications Server administration command line tool to reset web components.

LCSCMD /Web /Action:Activate /PoolName:<Pool Name –shortname not FQDN> /User:RTCComponentService /Password:<Password> (If Standard Edition leave this off.  Otherwise for Enterprise Edition add /Guest:RTCGuestAccessUser /GuestPassword:<Password>)

Additional information:  The following are links to additional Knowledge Base articles related to the issue.

https://support.microsoft.com/kb/953113, https://support.microsoft.com/kb/940779, https://support.microsoft.com/kb/939530, https://support.microsoft.com/kb/938286.