What is Azure AD
Azure Active Directory (Azure AD), now known as Microsoft Entra ID, is Microsoft’s flagship cloud-based identity and access management (IAM) service. This sophisticated platform authenticates and authorizes everything from employees accessing Microsoft 365 to non-human identities powering automated workflows. By treating both with equal rigor, it creates a unified control plane for managing authentication across your organization’s digital estate.
Core components and architecture
Azure AD’s architectural foundation is the tenant — a powerful, isolated digital identity ecosystem that will serve as your security perimeter in the cloud.
Far more than a simple directory, each tenant represents a private, secure vault that can store and manage all your identity resources. When an organization signs up for Microsoft 365 or Azure, a default tenant is automatically created, acting as the primary container for all identity-related objects: users, groups, applications, and service principals.
Tenants are sophisticated frameworks supporting complex identity scenarios. Through them, you can define custom domain names, configure multi-layered authentication methods, and even implement conditional access policies at a highly granular level. But the real magic happens in how these tenants handle different identity types:
- The identity framework sits at the core of Azure AD and user identities here take center stage. From cloud-native employee accounts to synchronized on-premises identities and external collaborators, each identity carries precisely defined roles and permissions that orchestrate access across cloud services.
- Service principals extend the identity management capabilities beyond human users. These programmatic identities enable secure, automated resource access for applications and services. They represent non-human entities in authentication processes, bridging the gap between application requirements and cloud resource access.
- Managed identities are the ones automatically managed by Azure largely limiting the need for manual credential management. They are available in system-assigned and user-assigned variants and simplify authentication for Azure services, thus reducing the complexity of credential handling and improving overall security posture.
- Rounding out this ecosystem are device identities, representing everything from laptops to servers. Through registration and management capabilities, Azure AD transforms these endpoints from potential security risks into controllable assets. By enforcing conditional access policies, it ensures only compliant devices can touch organizational resources, creating a seamless blend of convenience and security.
With this architectural approach, Azure AD has managed to transform identity management from a technical requirement to a strategic enabler of cloud innovation.
Identity governance and security capabilities
The platform transcends traditional identity management, delivering a sophisticated security ecosystem that can adapt to modern enterprise challenges concerning both human and non-human identities. The service provides intelligent authentication mechanisms designed to protect organizational resources through adaptive, context-aware policies. Let’s take a look at what that entails:
Authentication and access control
Azure AD’s native SSO stretches far beyond basic authentication, seamlessly connecting users to thousands of pre-integrated applications while enforcing robust security policies. When combined with conditional access, it evaluates multiple signals — from user behavior to device health — before granting access to resources.
Plus session controls add surgical precision to access management. Whether it’s restricting downloads in untrusted locations or enforcing step-up authentication for sensitive operations, these controls adapt to real-time risk levels.
Non-human identity management
There are two distinct approaches for non-human authentication that AD offers: service principals and managed identities. Service principals offer detailed control for external applications and automation tasks, while managed identities automate identity management for Azure-native applications.
For Azure-hosted workloads, managed identities eliminate credential management complexities through two types: system-assigned (tied to specific Azure resources) and user-assigned (standalone, shareable identities). These identities automatically obtain tokens without storing credentials, significantly reducing security risks.
The platform’s workload identity protection capabilities detect risks like leaked credentials and suspicious sign-in patterns. And through Conditional Access policies, organizations can automatically block compromised service principals and enforce location-based access controls.
Furthermore, Azure AD’s intelligent risk detection monitors workload identities for unauthorized credential changes, odd configuration modifications, and potentially malicious application role assignments. When risks are detected, automated remediation can include secrets rotation, service principal disablement, and Azure KeyVault secrets updates.
Application Integration
- Modern authentication protocols power secure token-based access through OAuth 2.0 and OIDC implementations.
- Application Proxy extends Azure AD’s capabilities to on-premises applications without complex networking changes.
Access governance
- Unified RBAC simplifies permission management across Azure’s ecosystem, governing both human and non-human access through a single control plane.
- Comprehensive audit trails track authentication decisions across all identity types.
Modern enterprises rely on Azure AD for comprehensive identity management. However, as non-human identities proliferate across cloud environments, organizations need specialized tools to manage this growing attack surface. Entro complements it by focusing exclusively on non-human identity discovery, lifecycle management, and behavioral analysis — filling critical gaps in non-human identity security while integrating seamlessly with Azure AD’s existing controls.