Hi, I am planning to add my first Windows 2003 DC. It is to my understand I need to follow the following procedure. 1. ADPrep /forestprep 2. ADPrep /domainprep Its also to my understanding that I should run the following command due that I have a Exchange 2000 Server. 3. ldifde.exe /i /f inetOrgPersonFix.ldf /c "DC=mycorp,DC=com" 4. Then run DCPROMO on windows 2003 member server I was wondering if I could do that during working hours or should I schedule a downtime? Will AD be unresponsive during that time? Also is the order I am running the commands right? Also could someone please explain me why do I have to run that command for Exchange? George S. Then run DCPROMO on windows 2003 member server