Hybrid identity protection gaps expose AD and Entra ID resilience

At a glance

What this is: This is an analysis of why hybrid AD and Entra ID environments need unified identity protection, with the key finding that fragmented backup and recovery creates visibility and restoration gaps.

Why it matters: It matters because IAM teams are accountable for preserving directory availability, access continuity, and recovery speed across both human identity and the non-human services that depend on it.

By the numbers:

• 9 out of 10 attacks target your identity infrastructure.

👉 Read Commvault's analysis of hybrid AD and Entra ID protection

Context

Hybrid identity means the organisation depends on Active Directory and Entra ID as linked control planes for authentication, authorisation, and directory data. When those systems are treated as separate recovery domains, a failure in one can cascade into the other and cut off access across the enterprise. This is a hybrid identity protection problem, not just a backup problem.

The primary issue is resilience, not convenience. If authentication fails, users lose access to cloud and on-premises systems, incident response can slow down, and recovery has to happen before the identity layer becomes a business outage.

For practitioners, the question is whether identity protection matches the operational criticality of directory services. Commvault's article frames the gap clearly: native recovery tools are limited, and fragmented protection strategies leave blind spots that attackers or operational mistakes can exploit.

Key questions

Q: What breaks when AD and Entra ID are not protected as one system?

A: When AD and Entra ID are treated as separate recovery domains, a failure in one can leave identity data inconsistent across both. That can break authentication, group membership, conditional access, and application access at the same time. The result is not just data loss, but a wider loss of service continuity across the identity layer.

Q: Why do hybrid identity outages affect more than login access?

A: Hybrid identity outages affect more than login because directory services control the relationships that make access work. If identity data, policies, or synchronisation paths fail, users can lose access to cloud and on-premises systems, and incident response can be slowed or blocked. Identity availability is therefore a core continuity dependency.

Q: How do security teams know whether identity recovery is actually working?

A: They know it is working when they can restore specific objects, policies, and relationships without rebuilding the full directory. Successful recovery should preserve group membership, policy state, and application dependencies, while also meeting recovery time objectives for authentication and access restoration.

Q: Who is accountable when hybrid identity protection fails?

A: IAM, infrastructure, and security leadership all share accountability because directory services underpin access across the enterprise. In practice, accountability should include recovery objectives, backup coverage, and restore testing for both AD and Entra ID. If identity is a business-critical service, it needs named ownership at that level.

Technical breakdown

Why hybrid identity makes AD and Entra ID a shared failure domain

In hybrid identity, AD often remains the authoritative source while identities and attributes synchronise one way into Entra ID. That design creates dependency, because corruption, deletion, or compromise in the source directory can propagate into the cloud identity layer. The operational risk is that authentication, group membership, enterprise apps, and access policies are all tied to the same identity graph. If recovery is not coordinated across both systems, the organisation may restore one directory while leaving the other inconsistent or unusable.

Practical implication: Map AD and Entra ID as one resilience domain and test whether restoration preserves identity consistency across both systems.

What limited native recovery leaves out in Entra ID protection

Native recovery features such as recycle bin functions are narrow and only help in specific scenarios. They do not solve broader protection needs such as recovering policy state, application configuration, role assignments, or cross-object relationships. For hybrid identity teams, that means a deletion may be recoverable while the surrounding access model remains damaged. Granular recovery matters because directory objects are not isolated records. They are linked controls that govern how access works across the environment.

Practical implication: Identify which identity objects and policy relationships cannot be restored cleanly with native tools alone.

Why unified backup and recovery changes identity resilience

Unified protection treats AD and Entra ID as one operational system and applies the same recovery discipline to both. That matters because identity recovery is about more than data retention. It is about restoring service continuity, preserving policy integrity, and reducing the time users spend locked out. Central visibility also helps teams detect drift, compare changes, and recover only the missing or damaged objects instead of rebuilding entire directories.

Practical implication: Design recovery runbooks around object-level restoration, policy rollback, and cross-directory consistency checks.

Threat narrative

Attacker objective: The objective is to disrupt or control the identity layer so access to applications, data, and recovery processes is denied or degraded.

1. Entry begins when attackers or operational failures target the identity infrastructure that underpins both AD and Entra ID, because compromise or disruption there has enterprise-wide reach.
2. Escalation occurs when directory changes, deletions, or misconfigurations propagate across synchronised identity systems, expanding the impact from one environment into the other.
3. Impact follows when authentication becomes unavailable, users are locked out of critical systems, and incident response or business operations stall until identity services are restored.

Breaches seen in the wild

• Cisco DevHub NHI breach — IntelBroker exploited exposed Cisco credentials, API tokens and keys in DevHub.
• Meta AI Instagram Account Takeover — 20,225 Instagram accounts hijacked via compromised Meta AI support chatbot with overprivileged access.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Hybrid identity resilience fails when organisations treat AD and Entra ID as separate recovery problems. In practice, the identity layer is already shared, because directory data, policies, and access dependencies flow between the two systems. The relevant question is not which platform failed first, but whether recovery is coordinated across the full identity graph. Practitioners should assume a single failure domain until proven otherwise.

Directory availability is now a business continuity control, not a narrow IAM issue. When authentication fails, access to production services, collaboration tools, and incident response paths can all stop at once. That makes recovery time an operational metric, not just an infrastructure metric. IAM and resilience teams need to align on service restoration objectives for identity itself, not only for downstream applications.

Fragmented backup strategies create identity blind spots that attackers and mistakes can exploit. Separate tools for AD and Entra ID tend to produce inconsistent restore points, slower response, and incomplete visibility into changes. The deeper issue is not tooling variety, but the assumption that hybrid identity can be safely managed in parts. Practitioners should judge protection by restore completeness across both directories.

Granular recovery matters because identity objects are governance objects. User accounts, group memberships, conditional access policies, and enterprise applications are linked controls, not standalone records. Restoring one object without its relationships can leave access broken in subtler ways than a full outage. The implication is that identity governance and recovery must be designed together, not separately.

Unified identity protection creates a clearer control plane for hybrid IAM operations. A single view across AD and Entra ID helps teams see changes, compare tenant and domain state, and recover only what has been lost or altered. That is especially relevant where human identity, application access, and non-human service dependencies meet in the same directory architecture. Practitioners should prioritise recoverability as part of access governance.

From our research:

• 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, according to The 2024 Non-Human Identity Security Report.
• 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.
• For lifecycle and recovery planning, NHI Lifecycle Management Guide helps teams connect provisioning, rotation, and offboarding to operational resilience.

What this signals

Hybrid identity resilience is becoming a board-level continuity issue, not just an IAM design choice. When directory availability determines whether users, administrators, and responders can operate, recovery design becomes part of service assurance. Teams should expect tighter scrutiny on restoration testing, policy rollback, and whether identity dependencies are mapped as critical infrastructure.

Hybrid identity protection gaps often surface first as operational inconsistency, not obvious compromise. That means teams need to watch for restore drift, stale policy state, and incomplete visibility across AD and Entra ID. The control question is whether recovery returns the environment to a known-good state quickly enough to keep access governance credible.

Identity blast radius is the practical concept here: if one directory change can affect another, the organisation has a wider recovery problem than it may have assumed. Practitioners should align identity governance with backup verification and compare recovery coverage against the expectations in the NIST Cybersecurity Framework 2.0 and NIST SP 800-53 Rev 5 Security and Privacy Controls.

For practitioners

• Define a hybrid identity recovery scope Classify AD and Entra ID as one operational recovery domain and document the objects, policies, and relationships that must be restored together. Include user objects, groups, enterprise applications, conditional access, and role assignments in the scope.
• Test object-level restore paths Run recovery exercises that restore missing or overwritten attributes, not just entire directories. Validate that restored objects retain the correct group memberships, policy links, and application dependencies after recovery.
• Measure identity recovery time objectives Set recovery targets for authentication services, directory objects, and policy rollback. Use those targets to determine whether current backup coverage is adequate for business continuity and incident response.
• Eliminate split-tool blind spots Inventory the current AD and Entra ID protection stack and identify where separate tools create inconsistent retention, visibility, or restore behaviour. Replace fragmented coverage with a coordinated approach where possible.

Key takeaways

• Hybrid identity should be treated as one recovery domain because AD and Entra ID failures can cascade across access, policy, and response workflows.
• The scale of the problem is operational as much as technical, because a loss of authentication can freeze user access and incident response at the same time.
• Practitioners need granular, unified recovery testing that restores objects, relationships, and policy state, not just directory data.

Key terms

• Hybrid Identity: A hybrid identity environment links on-premises and cloud identity systems so they operate as one access fabric. In this article, that means AD and Entra ID share directory data, policies, and authentication dependencies, which makes resilience a cross-system problem rather than a single-platform issue.
• Granular Recovery: Granular recovery is the ability to restore specific identity objects or attributes without rebuilding an entire directory. For hybrid identity, that includes preserving relationships such as group membership, policy links, and application bindings so restored access behaves correctly after an outage or deletion.
• Identity Blast Radius: Identity blast radius is the amount of access disruption caused when one identity control fails. In hybrid environments, a directory error can affect authentication, policy enforcement, and downstream application access, so the blast radius often extends well beyond the original change or outage.

What's in the full article

Commvault's full article covers the operational detail this post intentionally leaves for the source:

• Automated forest recovery workflows for Active Directory, including runbook generation and point-and-click recovery steps.
• Detailed coverage of granular restore options for users, groups, Group Policy Objects, roles, and conditional access policies.
• Interactive domain and tenant-wide comparison capabilities for spotting deleted objects and overwritten attributes.
• Centralised management details for teams that need to oversee identity recovery alongside other protected workloads.

👉 The full Commvault article covers automated recovery, granular restore options, and tenant-wide comparison capabilities.

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 building or maturing an identity security programme, it is worth exploring.