Active Directory (AD) is a Windows OS directory service that facilitates working with interconnected, complex and different network resources in a unified manner.Active Directory was initially released with Windows 2000 Server and revised with additional features in Windows Server 2008. Active Directory provides a common interface for organizing and maintaining information related to resources connected to a variety of network directories. The directories may be systems-based (like Windows OS), application-specific or network resources, like printers. Active Directory serves as a single data store for quick data access to all users and controls access to users based on the directory\'s security policy. Active Directory features include: Solution Active Directory (AD) is a Windows OS directory service that facilitates working with interconnected, complex and different network resources in a unified manner.Active Directory was initially released with Windows 2000 Server and revised with additional features in Windows Server 2008. Active Directory provides a common interface for organizing and maintaining information related to resources connected to a variety of network directories. The directories may be systems-based (like Windows OS), application-specific or network resources, like printers. Active Directory serves as a single data store for quick data access to all users and controls access to users based on the directory\'s security policy. Active Directory features include:.