I have a Virutal Exchange 2007 server (windows server2003) on which the out of office feature works fine.
I recenlty created a new virtual Exchange 2007 server on a windows server 2008 os. I've transfered all the mailboxes, the original exchange server has been shutdown and everything is working fine except for the out of office feature. It takes a very long time to access the out of office feature and sometimes it will not load and give a message that the server is busy. When I reactivate the old Exchange server, the access to Out of office is always immediate. The client computers are using Outlook 2007 to access the Exchange server.