1. Installation of Active Directory:-
Active Directory is in built package, which is installed by using command
DCPROMO. Type this command in the run dialog box and press enter. An Active
Directory installation wizard appears on screen. In this wizard we have to provide
require information like New Domain Controller, Domain Name (which must be Top
level Domain), installation of DNS server with Active Directory, Administrative
password for the purpose of Restore of Active Directory. After that, Active Directory
process continues and your computer start acting as a Primary Domain Controller.
User can not be logon Locally on Domain Controller. But only Administrator can.

2. Joining Workgroup computer to Domain environment
.
Client side configuration
•Log on as Administrator.
•Configure TCP/IP address, subnet mask and IP address of preferred
DNS server
•Now perform ping command. Now right click on my computer icon>
properties> then click on computer name tab. On this tab click on change
button.
•A new dialog box will be open. Now select domain radio button. In the
Domain text box type the NetBIOS name of your Domain name. then
press enter.
•An Authentication dialog box appears on screen. Provide Administrator
Username and Password of Domain Controller. And press enter.
•After successful authentication, a welcome message appears on screen.
•Click ok. Again click ok and restart your computer.
•On the user log on screen. In the Authentication dialog box, there is new
option Log on to is appeared. You can view it by click on option button.

3. If you want to log on to domain then select Domain Name.
If you want log on local computer then select Log on this computer
option and log on as Administrator.