Active Directory vs. Entra ID in hybrid identity governance

At a glance

What this is: This article compares Active Directory and Entra ID as identity operating models, arguing that hybrid identity remains a practical default for many organisations.

Why it matters: It matters because IAM teams must govern authentication, MFA, and access control across both on-premises and cloud identities without assuming a full migration is required or even appropriate.

By the numbers:

• 70% of organisations grant AI systems more access than they would give a human employee performing the exact same job.
• Only 44% of organisations have implemented any policies to manage their AI agents, despite 92% agreeing that governing AI agents is critical to enterprise security.

👉 Read IS Decisions' comparison of Active Directory and Entra ID for hybrid identity

Context

Active Directory and Entra ID solve different identity problems, which is why many enterprises still run both. Active Directory remains the control point for on-premises directories, legacy protocols, and local operational resilience, while Entra ID is designed for cloud-first access, SaaS integration, and built-in MFA.

For IAM teams, the key issue is not whether cloud identity is better in the abstract, but how to preserve governance across a hybrid estate. That means understanding where authentication is enforced, where policy lives, and which workloads still depend on directory control that cannot be shifted without operational or regulatory trade-offs.

Key questions

Q: How should security teams govern authentication in hybrid Active Directory and cloud identity environments?

A: Security teams should govern authentication by mapping each access path to the directory that actually enforces policy, then applying MFA and contextual controls at the authentication edge. The goal is not to force a single identity model everywhere. It is to make sure legacy systems, SaaS access, and remote endpoints are all covered by visible, enforceable controls.

Q: When should organisations keep Active Directory instead of moving fully to Entra ID?

A: Organisations should keep Active Directory when they still rely on legacy protocols, on-premises operational control, data residency constraints, or resilience requirements that cloud identity cannot replace. The decision is driven by workload fit and governance needs, not by cloud migration pressure. If identity supports critical local systems, on-premises control can remain the safer operating model.

Q: What do security teams get wrong about hybrid identity strategy?

A: Teams often treat hybrid identity as an interim compromise rather than an operating model that needs explicit governance. That leads to unclear ownership, inconsistent MFA coverage, and gaps between directory strategy and actual authentication behaviour. Hybrid identity works when the boundary is designed, documented, and reviewed as carefully as either platform alone.

Q: What is the difference between directory control and cloud identity convenience?

A: Directory control means the organisation directly governs identity infrastructure, policy placement, and local continuity. Cloud identity convenience means the provider manages more of the underlying service while the organisation gains simpler access and built-in features. The trade-off is control versus operational simplicity, and practitioners should choose based on risk, resilience, and compliance requirements.

Technical breakdown

Why hybrid identity persists in enterprise environments

Hybrid identity persists because identity is not only an access layer. It is also an operational dependency for legacy applications, disconnected environments, and regulated data residency requirements. Active Directory supports Kerberos, NTLMv2, and LDAP, which means it remains necessary wherever older systems still authenticate against the directory. Entra ID, by contrast, is built for cloud-first access patterns and reduces the burden of managing authentication across SaaS tools. The architectural difference is not cosmetic. It determines where control sits, how quickly policy changes propagate, and whether identity can keep working when internet access or cloud dependencies are unavailable.

Practical implication: inventory which applications still require on-premises directory control before treating cloud migration as an identity objective.

MFA and access control at the directory layer

The security gap between the two models is most visible at authentication. Entra ID has MFA built in and applies it naturally across cloud connections, while Active Directory does not provide native MFA. In AD environments, strong authentication must be added through companion controls or third-party tools that enforce MFA, SSO, and contextual access at the authentication layer. That distinction matters because security outcomes depend on where the control is enforced. If MFA is bolted on too late in the access path, legacy protocols and endpoints can remain exposed even when the policy exists on paper.

Practical implication: enforce MFA as close to the authentication event as possible for Windows logon, VPN, RDP, and remote access flows.

Cloud-native identity versus on-premises control

Entra ID centralises cloud identity management, but that convenience comes with a governance trade-off. The organisation gains simpler SaaS access and managed infrastructure, yet it also accepts a platform model where control is mediated through the cloud service. Active Directory keeps identity under direct organisational control, which can matter for sovereignty, continuity, and architecture decisions that cannot be externalised. For many teams, the decision is not about replacing one with the other. It is about assigning each to the environment it was designed to govern and then preventing policy drift across the boundary between them.

Practical implication: define which controls must remain locally governed and which can safely move into cloud-managed identity services.

NHI Mgmt Group analysis

Hybrid identity is not a transitional state for most enterprises. Many organisations will continue to run Active Directory and Entra ID side by side because legacy applications, compliance constraints, and operational continuity still depend on on-premises identity. That makes hybrid governance a permanent design problem, not a temporary migration artefact. IAM teams should treat the boundary between directory models as a control plane in its own right.

Identity control belongs where the workload actually lives. Active Directory remains the right anchor for environments that need local resilience, legacy protocol support, and direct administrative control. Entra ID fits cloud-native access patterns and SaaS governance, but neither model should be treated as universally sufficient. The implication for practitioners is to stop framing identity as a single destination and start mapping control to workload reality.

AD is not insecure by default, but it is incomplete without compensating controls. The article makes clear that AD can meet modern security requirements when MFA and access security are layered at the authentication point. That is a governance statement, not a product claim. Organisations that keep AD as the primary store must still prove that authentication strength, policy coverage, and remote access controls are enforced consistently across the directory.

Entra ID simplifies cloud access, but simplification changes the governance burden rather than removing it. A cloud identity platform reduces infrastructure overhead and centralises SaaS access, yet it also shifts dependence toward a managed service boundary. That changes how teams think about accountability, continuity, and regulatory fit. Practitioners should evaluate whether the operational convenience of cloud identity aligns with their security and sovereignty requirements before assuming migration is the answer.

There is a governance gap between directory strategy and authentication reality. The biggest risk is not choosing the wrong product category. It is believing that identity strategy is resolved at the platform decision while actual enforcement still happens across VPNs, RDP, Windows logon, and remote application access. Teams that ignore that gap end up with policy on paper and inconsistent security in practice.

From our research:

• Only 19.6% of security professionals express strong confidence in their organisation's ability to securely manage non-human workload identities, according to The 2024 Non-Human Identity Security Report.
• 88.5% of organisations acknowledge that their non-human IAM practices lag behind or are merely on par with their human identity and access management efforts, which shows how slowly governance models are catching up to machine identity sprawl.
• For the broader identity governance baseline, see Ultimate Guide to NHIs for the control patterns that bridge human, machine, and workload identity.

What this signals

Hybrid identity programmes should expect governance pressure to increase, not fade, because the operational boundary between on-premises control and cloud convenience is now a permanent enterprise design decision. Teams that still treat directory placement as a migration milestone will keep underestimating how much policy work remains after the platform decision is made.

Identity boundary drift: when authentication is split across AD and cloud identity, control ownership becomes harder to prove and easier to misconfigure. That is why practitioners should anchor their operating model to workload reality and continuously validate where MFA, access review, and policy enforcement are actually happening.

The readiness gap is broader than directory architecture alone. With 70% of organisations granting AI systems more access than they would give a human employee performing the exact same job, per the 2026 Infrastructure Identity Survey, identity teams are being pulled into a future where human, machine, and autonomous access rules must coexist.

For practitioners

• Map identity control by workload location Separate legacy on-premises applications, regulated systems, and cloud SaaS into distinct governance buckets so the directory model matches the environment being authenticated.
• Enforce MFA at the authentication edge Apply MFA and contextual access controls at the point where users authenticate to Windows logon, RDP, VPN, OWA, and RemoteApp so legacy pathways are not left as exceptions.
• Document the hybrid operating model Write down which identities, applications, and access paths remain anchored to Active Directory and which move to cloud identity so security reviews reflect operational reality.
• Validate continuity assumptions for on-premises identity Test how authentication, directory reachability, and policy enforcement behave during internet loss or cloud service interruption to confirm the on-premises model still meets resilience requirements.

Key takeaways

• Hybrid identity is a governance model, not a temporary compromise, because many enterprises still need both Active Directory and Entra ID for different workloads.
• The most visible security difference is authentication enforcement, since Entra ID has built-in MFA while AD requires additional controls to reach the same baseline.
• Practitioners should align identity control to workload reality, document the boundary between directory models, and validate that remote access paths are covered by policy.

Key terms

• Hybrid Identity: A hybrid identity model uses more than one identity platform to support different parts of the enterprise. In practice, that usually means keeping Active Directory for on-premises or legacy workloads while using a cloud identity service for SaaS and remote access. Governance must cover both sides of the boundary.
• Directory Control: Directory control is the ability to govern identity infrastructure directly, including policy placement, authentication enforcement, and operational resilience. It matters when organisations need local authority over access decisions, data residency, or continuity during cloud outages. The trade-off is more administration in exchange for greater direct oversight.
• Authentication Edge: The authentication edge is the point where an identity is actually verified before access is granted. Controls such as MFA, contextual policy, and access restrictions are most effective when enforced there rather than after the session has already begun. In hybrid environments, weak edges create invisible exceptions.

What's in the full article

IS Decisions' full article covers the operational detail this post intentionally leaves for the source:

• How the vendor applies MFA to specific AD authentication paths such as Windows logon, RDP, VPN, and OWA.
• How policy mapping works across users, groups, and organisational units without rebuilding the directory.
• What configuration overhead appears when bridging on-premises AD to cloud identity services.
• Which access security features are positioned for regulated or legacy environments that still depend on AD.

👉 IS Decisions' full article covers the authentication and access-security detail behind the hybrid identity decision.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity lifecycle are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or NHI governance in your organisation, it is worth exploring.