Sent Items missing in Outlook 2003/Exchange 2007
Some of our users were logging helpdesk tickets complaining about some of their sent items were missing from their sent items folder.
After looking in eventviewers and message tracking logs, all emails were delivered without a problem. I tried disabling outlook-rules and using various outlook switches like cleanviews and cleanrules, only to see them vanishing from the sent items folder.
Another odd thing was, that the sent items were only disappearing if the user requested a read receipt.
After troubleshooting for some hours, I found that the affected users were all using a different DelegateSentItemsStyle. These users were sending emails on behalf of other users and wanted the sent items to appear in the mailbox of the user and not in the mailbox of the delegate. According to MS KB articles http://support.microsoft.com/kb/953803 and http://support.microsoft.com/kb/953804 this involved installing a Outlook 2003 hotfix package and adding a registry key. Which I configured some weeks ago for a set of users.
After some more googling I found there was a bug in the Outlook hotfix package office2003KB953803GLB.
This bug is fixed in Outlook hotfix package office2003KB959628GLB
http://support.microsoft.com/kb/959628
After installing this hotfix all new sent emails showed again in the users sent items folder.
Grtzzzz
/Frederik