So at last RIM confirm they have a problem! .. Rumour control has the fix scheduled for BES 5.0 ... god knows when that will hit the streets!.
So esentially you when you migrate a Blackberry user to Exchange 2007 they shouldn't set an OoO from the BES device!?
EnvironmentBlackBerry® Enterprise Server software version 4.1 Service Pack 4 (4.1.4) for Microsoft® Exchange BlackBerry smartphone Microsoft® Exchange 2007 SDR145355
ProblemBlackBerry smartphone users with a Microsoft Exchange 2007 mailbox are unable to update Out Of Office text from their BlackBerry smartphones.
CauseMicrosoft Exchange 2007 provides the ability to set Out Of Office text for internal and external email messages. When internal Out Of Office text is set in Microsoft® Outlook® 2007, the Out Of Office text is updated on the BlackBerry smartphone. When setting or updating Out Of Office text on the BlackBerry smartphone, the internal Out Of Office text in Microsoft Outlook 2007 is not updated.
ResolutionThis is a previously reported issue that has been escalated internally to our development team. No resolution time frame is currently available.
WorkaroundSet or update Out Of Office text in Microsoft Outlook 2007 or using Microsoft® Outlook® Web Access 2007.
There is also an issue with OOO and outlook 2003.
See
http://www.blackberryforums.com/bes-admin-corner/112250-out-office-oof-corruption-blackberry-bes-exchange-2007-a.html
Yeah that is how I first noticed it, which outlook 2003 users on Exchange 2007 using BES 4.1 SP4
Initally RIM said it would be fixed in SP5, but the issue is actually quite complicated in the way microsoft has change OoO in Exchange 2007.
Will probably blog what happens at a later date