The problem is much trouble to me. i have a terminal server called A, and a domain server called B. The alert of RPC server is unavailable is pop up after enter username and password. Then i find the log from the EVENT VIEWER. Userenv Event ID 1053 is appearred first, which said Windows cannot deterine the user or computer name. (The RPC server is unavailable.) Group Policy processing aborted. Winlogon Event ID 1218 which said Failed to load terminal server profile path. Note that the profile path must be less than 256 characters in lenght. Winlogon Event ID 1219 is appearred frequently which said, Logon rejected for XXXX\XXX. Unable to obtain Terminal server user configuration. Error: The RPC server is unavailable. How to solve these all problem?