Active Directory is a directory service created by Microsoft (MSFT) that provides three services: * LDAP-like Directory services * Kerberos based authentication * DNS based naming and other network information It is an essential part of the Windows Server Family (including 2000, and 2003). AD is used to store information about Windows-based Networks and Domains. It allows management of users, security, and other resources on a centralized location over the network. It's not easy managing servers if you don't have a background on network administration. It's a good thing that the industry is already flooded with service-providers. Check out ensim.com. It's a good place to start for businesses who want quality implementation of Active Directory , Active Directory Management , Active Directory Tools , Exchange Management and Exchange Tool . How do we install Active Directory on a Windows server? It comes with your Windows Server installation disk. It's relativ...