I think that part of the answer is determined by how happy you are with your current Windows 2000 domain. If it works for you and you are convinced that it has not been compromised then upgrading it to a Windows 2003 domain is an option. The next question is how to do the upgrade in place and still be able to roll-back in the event of a nasty event occurring during the upgrade. My suggestion would be to clone the existing domain server before you do anything. You might even want to do all of the work on the clone machine first to get a sense of the issues that you will confront. If it goes well then you may be able to do a straight swap of the old domain controller with the new one. If you go this route, be sure to never let the old and the new server see one another on the network. I created a problem yesterday by doing something similar to that with a web server and it "was interesting". If it were me, I would also initiate a trouble call to Microsoft to get their sense of what I was trying to accomplish and what pitfalls might exist. For $245 you should be able get the perspective of someone who has dealt with the types of problems that can arise during the upgrade process. -----Original Message----- From: Oscar Castaneda [mailto:[log in to unmask]] Sent: Thursday, September 06, 2007 9:33 AM To: [log in to unmask] Subject: [MSUNAG] upgrading domain controller List, I am running a windows domain with a domain controller on Windows 2000. I have a new server with Windows 2003 and I want to make it the domain controller. The 2003 server is brand new, I haven't even turn it on. I had been reading what I found available in the internet about a 2003 taking over a domain from a 2000 but I would like to listen stories or experiences of people who went through this transition before. I am sure that many of you already did it. According with what I had seen, it seems to be an straight forward procedure, but you never know and I would not like to make my network go down. -- Oscar Castaneda Michigan State University __________ NOD32 2509 (20070906) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com