Active Directory
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| Active Directory | |
|---|---|
| Name | Active Directory |
| Developer | Microsoft |
| Released | 1999 |
| Latest release | Windows Server (various) |
| Operating system | Windows Server |
| Genre | Directory service |
Active Directory Active Directory is a directory service product developed by Microsoft for use in Windows Server environments. It provides centralized domain management, identity and access control, and object storage to support enterprise networks and services across organizations such as NASA, Toyota, Bank of America, BBC, and Walmart. Designed to integrate with protocols and standards adopted by institutions like IETF, ISO, and IEEE, it underpins many deployments alongside technologies from vendors including IBM, Oracle, VMware, Cisco, and Dell.
Overview
Active Directory implements a hierarchical database and service for managing users, computers, policies, and other objects used by enterprises, government agencies like United States DoD, and universities such as Harvard University, Stanford University, and University of Oxford. It originated from Microsoft's strategy around the time of releases tied to products like Windows 2000, and competes with directory solutions provided by organizations including Sun and Red Hat. Major adopters in the finance, healthcare, and retail sectors include JPMorgan Chase, Kaiser Permanente, and Target Corporation. Administrators interact with it using tools published by Microsoft and third parties like SolarWinds and ManageEngine.
Architecture and Components
The architecture comprises logical and physical structures such as domains, trees, forests, and organizational units used by enterprises like Goldman Sachs and Siemens. Core components include domain controllers, global catalog servers, schema masters, and replication systems similar in role to services from Oracle and SAP. Role-based deployment is common across data centers run by Equinix, AWS, Azure, and GCP. The schema is extensible and often integrated with identity stores from vendors like Okta and Ping Identity in federated setups used by corporations such as Twitter and Facebook.
Directory Services and Protocols
Active Directory uses standards and protocols such as LDAP-based APIs, Kerberos for authentication, and DNS for service location similarly to implementations seen in OpenLDAP, FreeIPA, and Samba. Interactions invoke specifications published by IETF working groups and draw upon cryptographic libraries influenced by recommendations from NIST and IETF TLS. Enterprises integrate it with mail systems like Exchange and collaboration platforms such as SharePoint and Office 365 for identity and directory-aware services used at organizations like McKinsey & Company and Accenture.
Management and Administration
Administration is performed using consoles and command-line tools provided by Microsoft and vendors including Quest Software and Netwrix. Policies are enforced via mechanisms comparable to Group Policy implementations referenced in corporate IT policy frameworks at Ernst & Young and Deloitte. Change control and auditing practices often align with standards like ISO/IEC 27001 and regulatory regimes such as SOX and GDPR, and are audited by firms like KPMG and PwC.
Security and Authentication
Security relies on authentication protocols such as Kerberos, certificate services interoperable with PKI frameworks, and auditing approaches recommended by agencies including NIST and CIS. Threats addressed by enterprise security teams at Microsoft, Symantec, McAfee, and CrowdStrike include lateral movement, credential theft, and privilege escalation observed in incidents affecting organizations like Equifax and Sony Pictures Entertainment. Mitigations follow guidance from bodies such as SANS Institute and US-CERT and are implemented with products from Tenable and Rapid7.
Deployment and Scalability
Deployments vary from single-site installations for small businesses to multi-site, cross-forest architectures used by multinational corporations including General Electric and Procter & Gamble. Scalability approaches mirror patterns used in distributed systems designed by cloud providers like AWS and Azure, employing replication, global catalogs, and site topology optimization used by operators at AT&T and Verizon. Large-scale migrations and consolidations have been conducted by consultancies such as Accenture and Capgemini for clients including Siemens and Toyota.
Interoperability and Alternatives
Interoperability is achieved with directory and identity products like Samba, OpenLDAP, FreeIPA, and federation services from Shibboleth and SAML-based providers used in academia by MIT and University of California, Berkeley. Alternatives and complements include cloud identity platforms from Okta, Auth0, and Azure AD (note: distinct product names), as well as enterprise identity management suites from IBM, Oracle, and Ping Identity. Migration and coexistence projects are often undertaken by professional services firms such as Deloitte and Ernst & Young for clients in sectors including healthcare and finance.