See this article: http://support.microsoft.com/default.aspx?scid=kb;en-us;292541 <http://support.microsoft.com/default.aspx?scid=kb;en-us;292541> The only way to do it is to revert back to an NT4 domain and start over. Install an NT BDC, dcpromo out your entire AD and then run dcpromo and start over. Windows 2003 has a NETBIOS domain name renaming tool, but there is still no tool to change the DNS Domain Name. They are two different things in an AD Domain. -----Original Message----- From: Marty [mailto:Marty@xxxxxxxxxxxx] Sent: Tuesday, July 29, 2003 5:41 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] renaming w2k server AD domain Does anyone have any experience with renaming a Domain Name on W2K Active Directory?