My user just upgraded from Office 2003 to Office 2010, to resolve the issues of disappearing tasks. The tasks though keep disappearing. This issue was happening in 2003 but continues in 2010. MS support states that Office 2010 is setup fine, and that the issue is with Exchange 2010. The tasks are there for awhile but then disappear.
What should I be looking for on my Exchange 2010 Server.