We've set up resources on our Exchange server and have not experienced any problems when users attempt to schedule meetings and add resources such as rooms and projectors. We do have one person who receives the following error whenever attempting to Send the meeting notice out when it includes a resource: "The operation failed. An object could not be found. Unable to directly book a resource for this meeting." Any idea why? I'm able to book the resource, since it's available, from any other PC.

Any ideas?