I have always been trained that it is essential that every computer on your network MUST have a unique SID (Computer Security Identifier). In today’s world of re-imaging computers, changing the SID is always the first step taken. I have a post that discusses using NewSID to easily change the SID on a server.
NewSID is a small executable that will reset your SID. It gives you the option to set a random SID, copy a SID from another computer or specify the SID. It will also allow you to change the current computer name.
How to correct the error “The object or some of the objects it contains cannot be deleted because access is denied Scope Agreement: To fix help removing the object (Member server) from active directory.”