I recently renamed a user account on one of our standalone WIN2008 servers (not a member of a domain).
That account is used to run a RemoteApp and since that change, the user cannot save from the application to the local disk (under tsclient) although they could before.
The error they get is the "No mapping..." error above.
I have searched for references to this error and there is a reference to a problem with Windows 2003 domain controllers, but nothing more recent.
The client is XP, the server is Windows 2008.