We have recently installed a new SBS2010 Server. We are still in test mode and are curently using an external hosted Exchange environment. We had 1 user authenticate to the new domain and ever since he has had problems with the Outlook proxy server name changing to the name of the new SBS SMTP server. I am NOT an exchange or NT server expert by any stretch. Can someone give me the exact sequence that I need to go through to change the setting on the server so that it points to the externally hosted server for now or at a minimum doesn't change the value on the Outlook client?