I am in the process of transitioning to Exchange 2007 from Exchange 2003, many of the users have Outlook 2007. Our policy is to disallow External OOF and only allow OOF internally. Exchange 2003 allowed administration to disable the External OOF feature.
I configured Exchange 2007 to disable external OOF by; On Exchange 2007 Under Organization Configuration - Hub Transport - Remote Domains - Default * - Out of Office Message Types delivered to this remote domain set at None. So my internal users will receive the OOF message and anyone externally will not.
I'm wondering if I can disable the External OOF feature on Outlook 2007 so the user will not have this option - i.e. grey-out the external OOF feature.