pjrouse wrote: Hi All, hope you can help? I'm a little stuck on Forest/Domain functional levels and how they relate to the ability to rename a domain? If you have a Forest at Windows 2000 level with a 2003 domain running at server 2003 domain functional level, can you rename that domain? Also if you upgrade your forest to the Server 2003 functional level does that upgrade all the domains to the server 2003 level too? Thanks for any help Paul