I get the following message while attempting to update the Offline Address Book in Exchange 2007. Warning: The recipient "therestaurantstore.com/Microsoft Exchange System Objects/Offline Address Book - First Administrative Group" is invalid and could not be updated. I also get the following error message in Outlook 2007 while running cached mode.
14:02:38 Synchronizer Version 12.0.6300
14:02:38 Synchronizing Mailbox 'user's name'
14:02:39 Microsoft Exchange offline address book