your out of office settings cannot be displayed, because the server is currently unavailable, please try again later.
Using Exchange 2007, Outlook 2007, server 2003
No users can set Out of office - they get the above error message. There is no problem with the server and it has been rebooted.
I can set Out of office when using the administrator account via OWA, I'm yet to test OWA with any users but seems the problem lies with outlook.