FYI: Can’t use Exchange Impersonation with GetUserOofSettings, SetUserOofSettings, or GetUserAvailability


I kept forgetting about this so maybe blogging it will help me remember.  As this thread confirms – you can’t call GetUserOofSettings, SetUserOofSettings, or GetUserAvailability when using Exchange Impersonation.  If you try to do this you’ll get an error that the Service Account is not the mailbox owner.