Hi All I think I know the answer to this but would just like confirmation please. I have been asked to rename our single AD domain. We are running Exchange 2000 also and the Organisation name will need changing. Am I correct in saying that the only answer is to build a brand new Domain Forest and reinstall Exchange 2000 and then recreate all the users with new accounts and then move over all the other servers and workstations. I won't even mention all the security and applications that will most probably break or the desktop fun that will ensue. I am pretty certain Microsoft do not support this with Windows 2000 and even with 2003 it won't work if Exchange 2000 is installed. I was just wondering if there were any third party tools that may help. I strongly suspect not but thought I would just ask in case I am mistaken or anyone has any better ideas. I even had the utterly wild thought of creating a new tree in the same forest and then deleting the trusts but I don't see how that would help really as when I install Exchange on the new Domain it will look for the existing box as AD would still be aware of it and I can't see how that would get around having the wrong Organisation name either. In fact I could see the whole remaining AD structure on the new Domain being a complete mess. Please feel free to correct me if I mistaken or have missed something. Any thoughts or ideas greatly appreciated. Many thanks in advance. Regards, Paul Lemonidis.