Adding Active Directory Users and Computers to Windows Server 2008

From Server Manager (available under Administrative Tools), go to "Features", then "Add Features".

Windows Server 2008 Standard Instructions:

Expand:

• Remote Server Administration Tools
  • Role Administration Tools
    • Active Directory Domain Services Tools

Then check Active Directory Domain Controller Tools.

Windows Server 2008 R2 Instructions:

Expand:

• Remote Server Administration Tools
  • Role Administration Tools
    • AD DS and AD LDS Tools
      • AD DS Tools

Then check AD DS Snap-Ins and Command-Line Tools.

Feature Includes:

• Active Directory Users and Computers
• Active Directory Domains and Trusts
• Active Directory Sites and Services