In fact, the AD-DS role is what enables the server to act as a Domain Controller, but you will still need to run DCPROMO the regular way. This step is the installation of Active Directory Domain Services (AD-DS) role on the server. In Windows Server 2008, unlike previous server operating Systems, there is an additional step that needs to be taken before running DCPROMO to promote the server to Domain Controller and installing Active Directory on it. Installing Active Directory Domain Services (AD-DS)
