2000 to 2003 DC

Make the 2003 server an additional DC with a temp name and IP.

Dcpromo the 2000 DC out.

*Rename the 2003 DC: http://www.petri.co.il/windows_2003_domain_controller_rename.htm

*This is not a recomended task to do, so I would see if there was any option to berry the old DC name because there might be traces of it in the domain even after you dcpromo the 2000 DC.


SG

and change the IP: http://technet.microsoft.com/en-us/library/cc758579.aspx


SG

Why does it have to have the same name?  Is this something that could be handled with a CNAME in DNS?  

If you have to change the domain controller back to the old one later on, just make sure the old DC is completely and successfully removed from AD, DNS, and WINS if there is one. Not sure if the new Windows Server 2003 DC is the only one DC. If so, it would be better if you have a good backup first, even better if you have two or more DCs. If you already have multiple DCs and also with AD site created, then you also need to remove the old DC name from the AD site and services console under Servers. If not, no worry.

In these days, application shouldn't rely on IP address and servername. If you have the dependecy of IP and servername, it would be just some script and those scripts should probably be written in a way where you can adjust it much easier than renaming a domain controller.  Script or application should not rely on IP address, if it does, it's more of a defected configuration. If firewall rule restricted for certain IP, it should be still relative easier to adjust than forcing to reuse the IP and servername. If your IP at one point will be merge with another sister company, you will not be able to reuse the same IP. Same thing as naming convention, one of these days your namename may also need to be changed. So, IP and Servername should be able to change without any concern. If that's the case, why waste time to change your IP and servername back.

Thanks guys,I don't think i will change the IP & Server name.
I'm also running exchange 2003 on the same network ,will exchnsge configuration be affected with the dc being 2003.Pls let me know.

Thanks SG ,will do this tomorrow night  confirm success.Chrz

If Exchange is installed on a DC, do NOT demote the DC, or Exchange will break.  If Exchange is installed on a member server, do NOT promote the server to a DC, or Exchange will break.  :)