- Services
-
- Who we are
- Resources
-
-
- Stay up-to-date
—read our experts' unique takes on trends in cybersecurity.
-
- Explore our resources for advice on boosting your organization's security.
-
-
- Get in touch
Active Directory
Active Directory
Active Directory is Microsoft’s directory service that manages users, computers, and other resources within a Windows domain network. Originally released with Windows 2000 Server, it provides authentication and authorization services, enabling administrators to assign policies, deploy software, and apply critical updates across an organization. Active Directory uses a hierarchical structure of domains, trees, and forests, storing information about network objects in a centralized database that can be queried and managed through various tools and protocols including LDAP.
Last Updated: November 25, 2025
Active Directory Replication
The multi-master process that propagates directory changes between domain controllers using update sequence numbers...
Last Updated: November 25, 2025
Domain Controller
A Windows Server that stores a copy of the Active Directory database and responds...
Last Updated: November 25, 2025
Entra Connect Sync
A Microsoft tool that synchronizes on-premises Active Directory objects, attributes, and (optionally) password hashes...
Last Updated: November 25, 2025
Flexible Single Master Operations (FSMO) Roles
Five specialized roles—Schema Master, Domain Naming Master, Infrastructure Master, PDC Emulator, and RID Master...


