We have two windows 2003 server based servers. One of them is a domain controller the other one is a member server, which used to be the main exchange server. I transferred the main exchange server role to a third member server and made this server just a member exchange server, but nothing resides in it. That means I can easily remove the exchange server from this server.
Now I want to promote this server to the main domain controller and the old domain controller to backup domain controller. What steps should I follow not to mess up our system in the process? Please advise.