I currently have a DC that is running server 2003 r2. I need to upgrade it to the the enterprise version and turn it into a mail server as well thus the upgrade. I allready have the new software so let's skip the server 2008 suggestions. I am wodering if I could do what I will call an in place upgrade. Meaning can I remove it from the networkk and load the new server 2003 enterprise server and just do an upgrade or should I do a full clean install?

Thank you as alwyas...Chris P.