One of my users has an old recurring calendar appointment that they cannot
delete. When trying to access the meeting, it throws an error: Can't open
this item. The operation failed. The object could not be found. We are
using Outlook in Corporate and Workgroup mode and thus the majority of the
solutions do not apply as most address pst's. Additionally this happens on
any machine with either 2000 or 2003 versions. Since it is not machine
specific, deleting the frmcache.dat didn't help.

Any ideas are greatly appreciated.