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Lesson 4 Establish a root domain
Objective Create a Root Domain

Establish and Create a Root Domain in Active Directory

As you learned earlier, the domain is the basic unit of organization in Active Directory. Here, you can see the root domain within the larger context of Active Directory:

This is a root domain

How to create a root domain

To create a root domain, run the Dcpromo.exe file to start the Active Directory Installation Wizard. Once the wizard is launched, you will complete a series of steps to create a root domain. The following simulation guides you through this process:
Root Domain
After you finish specifying the installation information, the Active Directory Installation Wizard installs Active Directory, converts the computer to a domain controller, and adds the following three consoles to the Administrative Tools menu on that computer.
These consoles will be installed with the completion of all the installation paths.
Microsoft Management Console (MMC): A framework for hosting administrative tools, called consoles. A console may contain tools, folders or other containers, World Wide Web pages, and other administrative items. These items are displayed in the left pane of the console, called a console tree. A console has one or more windows that can provide views of the console tree.

Function  
Active Directory Users and Computers Administers and publishes information in the directory
Active Directory Domains and Trusts Administers domain trusts and user principal name suffixes and changes the domain mode
Active Directory Sites and Services Administers the replication of Active Directory data, including information about domain controllers, sites, replication between sites, and replication of network services' configurations

Here is what the Administrative Tools menu should look like once you have added the consoles:

This is the Administrative menu

As you pursue other installation options (such as establishing a child domain or a tree), you will find that the process for installing various parts of Active Directory with the wizard are remarkably similar to the one described above. The lessons that follow will remind you of this process and will point out what is different about them. But if you find yourself wanting a review of what the wizard will do at each and every step, return to this lesson.
In this lesson, you created a root domain and a domain controller for that root domain. You will build on that skill in the next lesson by creating a domain controller in an already existing domain.

Create Root Domain

Click the Exercise link below to try creating a root domain on your own.
Create Root Domain

[1]Root domain: The first domain created in a domain tree.