You want to promote a server to a domain controller. You may need to promote a domain controller to either initially create a domain in an Active Directory forest or add additional domain controllers to the domain for load balancing and failover.
dcpromo.exe from a command line or via Start
→ Run and answer the questions according to the forest and
domain you want to promote the server into.
Promoting a server to a domain controller is the process where the
server becomes authoritative for an Active Directory domain. When you
dcpromo program, a wizard interface walks
you through a series of screens that collects information about the
forest and domain to promote the server into. There are several
options for promoting a server:
You can automate the promotion process by running
dcpromo during an unattended installation. See
Recipe 3.4 for more details.