We have setup our conference rooms as users in Exchange so that our employees can reserve the rooms as they need. All they do is select room as a recipient and reserve it as a resource. Everything works fine, but when we login to the room accounts in OWA, we are unable to see the body of the calendar invite/confirmation. There is an HTTP 500 error in the body.
"This error (HTTP 500 Internal Server Error) means that the website you are visiting had a server problem which prevented the webpage from displaying.
For more information about HTTP errors, see Help."