Hi Tom It won't go through the tunnel, DNS resolves properly internally and externally. Either by owa or Outlook. The RPC isn't being passed through for some reason. Steve This E-Mail is confidential. It is not intended to be read, copied, disclosed or used by any person other than the recipient. Unauthorised use, disclosure, or copying is strictly prohibited and may be unlawful. Optimum Computer Solutions disclaims any liability for any action taken in connection of this E-Mail. The comments or statements expressed in this E-Mail are not necessarily those of Optimum Computer Solutions or its subsidiaries or affiliates. usermanager@xxxxxxxxxxxxxxx