Re: Change Domain Name in AD
I think that you can rerun the wizard to change the external/public facing domainname at anytime later again. But you can not change the internal AD DS Domainname after install on SBSe domains. Rendom.exe (the tool for renaming in W2K3) can only be used if you're in W2K3 functional levels on both domain and forest.
Re: Change Domain Name in AD
FunkyMoose,
What domain functional level are you running at serer 2003 or server 2008 ?
If you are running windows server 2008 or 2008 R2, this is a pretty stright forward process.
As Einstein mention, you can use this instructions to rename your domain.
technet.microsoft.com/en-us/library/cc794883(WS.10).aspx