Outlook 2007 free/busy data could not be retrieved. Our users are running on Windows Server ’08 standard. Their computers are on Windows XP SP3. We have just upgraded to Exchange ’07 and MS Office ’07. There is one problematic user. When the others are opening the scheduling assistant and try to add this user, it says that the data couldn’t be retrieved. Data of other users are viewable by us. I can also access the data using Office ’03. All users have the reviewer rights so we can view his calendar and see his events. I have tried to open Outlook with CleanFreeBusy but nothing happened.