I have a Server 2003 domain in place and want to add a server 2003 R2 domain controler. I saw an artical that I need to run adprep.exe /forestprep from the schema master. This is fine, but is that all I have to do? Do I have to do anything to update this computer to R2 or is running the adprep enough. And will this not cause any issues for the other 2003 domain controlers that are on the domain? Please let me know anything you can. Thanks.