The domain name %1 might be a NetBIOS domain name. If this is the case, verify that the domain name is properly registered ...

The domain name %1 might be a NetBIOS domain name.  If this is the case, verify that the domain name is properly registered with WINS.  If you are certain that the name is not a NetBIOS domain name, then the following information can help you troubleshoot your DNS configuration.