Hi, I've looked on the MS KB, but can't find a solution to this - can anybody help? I have an NT4 Small Business Server which acts as the primary domain controller on the network. I also have a Windows 2000 member server on the same domain. The NT4 box has served me well, but is now past its sell-by date, so I want to promote the 2000 member server to be a domain controller on the domain so that I preserve my user SIDs, etc.. If I run DCPromo on the 2000 server and specify that I want it to be an additional server on an existing domain, I get an error because Active Directory doesn't exist on the NT4 box (obviously). Does anybody know a work-around, or do I have to trash my users, etc. and create a new domain from scratch on the 2000 server? Best wishes. Tim ** To leave the list, click on the immediately-following link:- ** [mailto:program-l-request@xxxxxxxxxxxxx?subject=unsubscribe] ** If this link doesn't work then send a message to: ** program-l-request@xxxxxxxxxxxxx ** and in the Subject line type ** unsubscribe ** For other list commands such as vacation mode, click on the ** immediately-following link:- ** [mailto:program-l-request@xxxxxxxxxxxxx?subject=faq] ** or send a message, to ** program-l-request@xxxxxxxxxxxxx with the Subject:- faq