We have a few users that are receiving a synchronization error in Outlook 2003 or Outlook 2007 that states "Microsoft Exchange offline address book. Not downloading Offline address book files. A server (URL) could not be located. 0X8004010F". They receive this message every hour based on when they start outlook in the morning. I have attempted to open this questions before on here, and can not get this issue resolved. Any suggestions are appreciated.