Active Directory is a directory service created by Microsoft for managing Windows environments.
It is used for:
- A centralized Authentication/Authorization source for Kerberos and NTLM protocols.
- Providing a single authentication/authorization domain for member servers and workstations.
- Providing LDAP services.
- Providing centralized configuration methods of Windows workstations and servers through Group Policy and other methods.
- Multi-site replication of directory-database data.