Promote Domain User to Domain Admin in Windows Server 2008
In Windows server 2008 active directory domain environment whenever a new user account is created by default it becomes the member of Domain Users group. Although there are very few administrators in any network setup however many times domain users are also promoted as domain admins so that they can take care of some administrative tasks in order to reduce some burden from the administrators’ shoulders. Process of changing group membership in domain controllers is a bit different than that of local client computers. As an administrator in any Windows server 2008 domain environment if you want to promote any domain user to domain admin you are required to follow the steps given as below:
1.      Ensure that you are logged on to Windows server 2008 domain controller with domain admin credentials.
2.      Open Active Directory Users and Computers snap-in by going to Administrative Tools.
3.      Locate and right click on the account that you want to promote as domain admin and click on Properties from the menu.
4.      On the Properties box go to Member Of tab and click on Add button.
5.      Browse for Domain Admins group on the opened box and click on Ok button when found and selected.
6.      Back on Member Of tab remove any other group that the user is member of (optional) and click on Ok button to make the changes permanent.