Microsoft Entra

The Microsoft Graph API covers users, groups, applications, directory roles, conditional access policies, and audit logs. The breadth reflects Entra's position as the identity hub for the Microsoft ecosystem. Agents can manage user lifecycle, group membership, application access assignments, and read audit logs for compliance reporting. The API surface is extensive and reflects years of enterprise requirement accumulation.

Reliability is enterprise-grade and Microsoft-maintained. Microsoft Graph API is one of the most heavily used enterprise APIs in the world and maintains high availability SLAs. Rate limiting is well-documented; agents making bulk user management calls should implement appropriate throttling and retry logic per Microsoft's throttling guidance.

Microsoft Entra ID (formerly Azure Active Directory) is the enterprise identity foundation for organizations running Microsoft 365 and Azure. Its Microsoft Graph API provides programmatic access to user, group, device, and application management across the Microsoft ecosystem. For agents operating in enterprise Microsoft environments — which describes the majority of large organizations — Entra ID integration is not optional; it is the identity layer that gates access to Teams, SharePoint, Exchange, and enterprise applications.

Authentication uses OAuth 2.0 with Microsoft identity platform credentials — app registrations with appropriate permissions, client credentials for daemon/agent scenarios, and delegated permissions for user-delegated access. The app registration and permission model requires planning — specific Graph API operations require specific permission grants, and some require admin consent. Teams should document the exact permissions their agent integrations require.

Documentation is extensive and maintained by Microsoft's documentation team. The Microsoft Learn platform provides conceptual guides, API reference, and code samples for all supported scenarios. The breadth of documentation can be overwhelming — teams should start with the specific use case guides rather than attempting to read the full Graph API reference. Microsoft's developer documentation quality is high despite the volume.