You couldn’t make this up! We are seeing this mainly with Blackberry users and Outlook 2003 … gets even better!
“..at the present time RIM do not support Exchange 2007 SP1 for use with BlackBerry Enterprise Server software”
Remind me, how long has Exchange 2007 Service Pack 1 been out?
January 30, 2008
942227: You may receive duplicate Out of Office messages in Outlook 2003 after your mailbox is migrated to Exchange Server 2007
Your mailbox is migrated from Microsoft Exchange 2000 Server or from Microsoft Exchange Server 2003 to Microsoft Exchange Server 2007. After this occurs, you may receive duplicate Out of Office messages. This issue occurs when you use Microsoft Office Outlook 2003 as the e-mail client.
This issue occurs because Outlook 2003 changes the PR_OOF_STATE property or the LegacyReplyTemplate property before the Exchange 2007 Out of Office Assistant can process the change. Because this change is never processed, the client produces a duplicate Out of Office message.
To resolve this issue, install Microsoft Exchange Server 2007 Service Pack 1.