When I try to establish a trust relationship between two domains woned by the same company, I get a SID conflict error. My belief is that the servers were probably both installed from a ghosted copy and both servers have the same SID.<br>I also read another article pointing to user name existance from one domain on the trusted domain so we will ensure that domians have only users from the repsective domain listed. But I am afraid it is the SID conflict problem. In one of the domains with sites throughout the country we have about 100 users or more. The other domain is only local and has about 4 servers (including Exchange) what reprocussions do I have if I use a SID renamer...is the ebst way to go about reinstallation???<br><br>Thanks in advance.