TL;DR: Hybrid identity environments create a single failure domain across AD and Entra ID, so outages, deletions, or corruption can quickly lock users out of critical systems and halt incident response, according to Commvault. The practical issue is not just backup coverage, but whether identity recovery is fast, granular, and unified enough to preserve access when directory services fail.
At a glance
What this is: This is a Commvault analysis of why hybrid identity protection for AD and Entra ID breaks down when recovery is fragmented, with unified restoration presented as the key resilience gap.
Why it matters: IAM, IGA and PAM teams need to treat directory recovery as an access continuity issue because identity failure can halt cloud access, on-premises access and incident response at the same time.
Context
Hybrid identity is the operating model where an on-premises directory and a cloud identity service jointly govern access. In this article, that means Active Directory remains the authoritative source while Entra ID extends access into Microsoft 365 and other cloud applications, creating a shared dependency for authentication, policy and recovery.
The governance gap is not whether identity data is synchronised, but whether the organisation can restore identity services fast enough when one side fails. When AD and Entra ID are protected separately, visibility, recovery sequencing and rollback consistency all degrade, which turns identity availability into a business continuity problem rather than a narrow directory problem.
Key questions
Q: What breaks when AD and Entra ID recovery is fragmented?
A: Fragmented recovery breaks the operator’s ability to restore identity as a single service. You may recover deleted objects in one directory but still leave broken group membership, policy drift or application bindings in the other. The result is partial restoration, slower incident response and continued access failure even after the directory appears healthy.
Q: Why does directory failure create such broad business impact?
A: Because identity is the access layer for both cloud and on-premises systems. When authentication fails, users cannot reach business applications, privileged admins cannot remediate quickly, and incident response teams may lose the very access they need to recover. That makes directory resilience a business continuity requirement, not just an IT issue.
Q: How do you know if identity recovery testing is actually working?
A: Use full restore drills that validate behaviour, not just data presence. A successful test should prove that users authenticate, applications receive access correctly, and automation still works after rollback. If the team still needs manual fixes, the recovery design is incomplete.
Q: Should organisations prioritise unified recovery over separate AD and cloud tools?
A: Yes, when the identity model is hybrid. Separate tools can leave blind spots, inconsistent rollback and slower restoration because they do not treat the directory estate as one dependency chain. Unified recovery matters most where directory state directly controls business access and incident response readiness.
Technical breakdown
Why AD and Entra ID behave like one control plane
AD and Entra ID are not isolated identity islands in a hybrid environment. AD often holds the authoritative user record, while Entra ID inherits those identities, policies and application relationships for cloud access. That coupling means object deletion, attribute corruption or policy drift in one directory can propagate into access loss across both environments. Recovery therefore has to preserve not just the user object, but group membership, role assignments, conditional access logic and enterprise application bindings. If those dependencies are recovered inconsistently, the directory may come back online while access still remains broken.
Practical implication: Treat hybrid identity as a single recovery domain and map the dependencies that must be restored together.
Why native recovery features are not enough for hybrid identity
Native recovery tools tend to be narrow in scope, object-specific or bound to a single control plane. That is workable for isolated deletion cases, but it is insufficient when the issue involves broader directory corruption, overwritten attributes or intertwined AD and cloud policy state. Hybrid identity recovery needs more than object restore. It needs point-in-time rollback, preservation of relationships between identities and policies, and the ability to recover only the damaged attributes without forcing a full rebuild. The technical problem is precision, not just retention.
Practical implication: Validate whether your recovery process can restore attributes, policies and relationships, not just deleted objects.
How fragmented protection creates recovery blind spots
Separate tools for AD and Entra ID produce separate recovery models, separate visibility and often separate operational teams. That fragmentation makes it harder to compare domain and tenant changes, detect malicious or accidental overwrite, and sequence restoration in the right order. In practice, this is where recovery time stretches and confidence falls. A unified model does not remove complexity, but it collapses the number of places operators must inspect when authentication fails. For identity, that reduction in operational friction is a resilience control, not a convenience feature.
Practical implication: Consolidate change visibility and restore workflows so operators can recover across both directories from one place.
Threat narrative
Attacker objective: The objective is to disrupt authentication and force operational paralysis by undermining the identity services that every downstream system trusts.
- Entry occurs when an attacker, operator error or synchronization failure affects AD or Entra ID, because both directories sit on the access path for critical systems.
- Credential and policy state are then abused or corrupted through deleted objects, overwritten attributes, broken group membership or altered access controls that change who can authenticate.
- Impact follows when users lose access to cloud and on-premises resources, business applications stop trusting the directory, and incident response is slowed because authentication is unavailable.
Breaches seen in the wild
- Storm-0501 hybrid cloud attacks 2024: Ransomware affiliate Storm-0501 stole Entra Connect Sync credentials to move from on-prem AD to Entra ID, then forged tokens via a rogue federated domain.
- Cisco Active Directory credentials leak 2025: Kraken leaked Cisco Active Directory hashes, including service and krbtgt accounts; Cisco says they came from its 2022 breach, not a new one.
Read and download The State of NHI & AI Agent Breach Report 2026, covering 200+ breaches impacting Non-Human Identities including AI Agents.
NHI Mgmt Group analysis
Hybrid identity resilience is now an access continuity problem, not a backup problem. When AD and Entra ID share the same authentication fabric, recovery quality determines whether the business can function after a directory failure. The relevant question is no longer whether backups exist, but whether access can be restored with the right objects, attributes and relationships intact. Practitioners should treat identity recovery as a core availability control.
Fragmented recovery creates an identity blast radius that operators underestimate. Separate protection strategies for AD and Entra ID leave gaps in visibility, sequencing and rollback. That gap is not just operational inefficiency; it is a governance blind spot because the organisation cannot prove it can restore access across the actual dependency chain. The practitioner conclusion is that hybrid identity needs a single recovery model, not parallel assumptions.
Authoritative source plus cloud extension is the governance model, but it also creates coupled failure. AD remains the source of truth for many organisations, while Entra ID extends that trust into cloud applications and policies. That architecture works only if the recovery model understands the same coupling. Practitioners should evaluate whether their identity programme can recover both the source and the extension layer as one system.
Identity recovery is part of shared responsibility in cloud access governance. The article correctly places the burden on customers to protect identities, configurations and data even when the cloud platform stays online. That responsibility extends beyond MFA and access policy design to the ability to restore the directory state behind those controls. Practitioners should consider recovery governance as a standing part of Entra ID accountability.
Unified recovery becomes the practical expression of zero trust for identity infrastructure. Zero trust assumes verification and controlled access, but none of that matters if the directory cannot be restored after corruption or deletion. In hybrid identity, continuity of identity state is the precondition for every downstream control. The conclusion for practitioners is straightforward: if identity recovery is fragmented, the rest of the access model inherits that fragility.
From our research library:
- 69% of security leaders agree identity management must fundamentally shift to address agentic AI systems, according to the 2026 Infrastructure Identity Survey.
- Read next: NHI Lifecycle Management Guide
What this signals
Hybrid identity continuity now depends on restoring relationships, not just objects. A directory that comes back online without intact group membership, application bindings and access policy state still leaves the business exposed. For practitioners, the practical shift is to test recovery as an end-to-end access event rather than a storage or backup event.
Identity recovery is becoming a resilience benchmark for the broader IAM programme. The article’s core message is that availability, integrity and access governance now intersect inside the directory layer. Teams responsible for IAM, IGA and PAM should assume that if the identity backbone cannot be restored cleanly, downstream controls will fail with it.
For practitioners
- Map the hybrid identity dependency chain Document which AD objects, Entra ID objects, group memberships, roles, conditional access policies and enterprise applications must be restored together after an outage or corruption event.
- Test granular restore across both directories Run recovery tests that restore missing or damaged attributes, not just deleted objects, and confirm that access works after the restore in both cloud and on-premises systems.
- Validate recovery speed against access loss Measure how long it takes to bring authentication back for critical users and applications after deletion, corruption or sync failure, then compare that against business tolerance for outage.
- Unify directory change visibility Use a single operational view to compare tenant and domain changes so malicious overwrites, accidental deletions and synchronisation drift can be identified before they spread.
Key takeaways
- Hybrid identity failure is operationally severe because AD and Entra ID share the same access dependency chain.
- Recovery quality matters more than backup presence when directory corruption, deletion or outage interrupts authentication.
- Teams need tested, unified restore processes that preserve policies, attributes and relationships across both identity systems.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and MITRE ATT&CK address the attack and risk surface, while NIST CSF 2.0 and CIS Controls v8 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 — Improper Offboarding | Recovery gaps leave deleted or changed identity state lingering across AD and Entra ID. |
| NHI-08 — Environment Isolation | Hybrid identity couples on-premises and cloud directories, so failures cross environment boundaries. | |
| Recommendation — Restore identity objects and relationships cleanly so stale or partial directory state does not persist. Separate and test recovery paths so one identity environment cannot strand the other. | ||
| NIST CSF 2.0 | PR.AA-05 — Access Permissions, Entitlements and Authorizations | The article centers on restoring entitlements and authorization state after directory disruption. |
| Recommendation — Verify that recovered entitlements, roles and policies match the approved access model before re-enabling access. | ||
| CIS Controls v8 | CIS-5 — Account Management | Directory restore quality directly affects account integrity and access continuity. |
| Recommendation — Audit account recovery and restoration procedures to ensure directory state can be rebuilt accurately. | ||
| MITRE ATT&CK | TA0006;TA0008 — Credential Access; Lateral Movement | The breach examples and identity failure model both show how directory trust supports credential abuse and movement. |
| Recommendation — Map directory credential exposure and token abuse to TA0006 and TA0008 in your detection and response planning. | ||
Key terms
- Hybrid Identity: Hybrid identity is an architecture that connects on-premises directories with cloud identity providers and SaaS applications. It creates operational flexibility, but it also expands the blast radius of identity compromise across multiple systems that share trust and authentication dependencies.
- Directory recovery: Directory recovery is the process of restoring identity objects, attributes, relationships and policy state after deletion, corruption or attack. For hybrid environments, it must preserve cross-system dependencies, not just bring the service back online.
- Granular Restore: The ability to recover a specific file, record, mailbox item, or application object instead of restoring an entire environment. For SaaS applications, granular restore reduces disruption, speeds incident recovery, and supports more precise operational and compliance responses.
- Identity resilience: Identity resilience is the ability to keep authentication, authorisation, and recovery functions operating when identity systems are attacked or degraded. In practice it means trusted access can be restored without reintroducing compromised state, and with enough evidence to prove the restored identity plane is clean.
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Published by the NHIMG editorial team on July 9, 2026.
Updated on October 11, 2026.
NHI Mgmt Group, the independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org