Sometimes (but often enough to annoy) Remote Desktop Connection cannot connect to a server (2008 R2 but maybe also 2003) and claims that
"The connection was denied because the user account is not authorized for remote login."
The user is always authorized for remote login and the connection works from other clients. (Although this is the very same message that appears when a user really isn't autorized for remote login.)
The problem always goes away after a client restart.
The client is always Windows 7 but I have no (other) reason to assume that it only affects Windows 7 clients.
Any idea what causes this?