How do you review access to groups and applications with Microsoft Entra access reviews?

How access reviews work in Microsoft Entra

microsoft entra access reviews are a structured way to revalidate who should still have access. The reviewer is given a defined scope, such as users in a group or assignments to an application, and asked to confirm whether each access grant is still justified. The control is only effective when the decision is tied to removal, retention, or exception handling.

The practical value comes from making review decisions operational, not ceremonial. For group access, that means checking whether membership still supports the business role or task. For application access, it means confirming whether the person, group, or service still needs the entitlement and whether the application owner has enough context to judge it correctly.

Access reviews are most reliable when the reviewer is close enough to the access to understand it, but not so close that the review becomes rubber stamping. In Microsoft Entra, that usually means choosing the right reviewer type for the subject, then setting the review to recur often enough that stale access does not build up between cycles.

How to structure the review so decisions are useful

Start by scoping the review narrowly enough that the reviewer can make a real decision. A good review scope usually groups related access together, such as one application, one set of groups, or one access package, rather than mixing unrelated entitlements in one pass. The goal is to make each decision specific enough to act on.

The reviewer should see enough context to decide whether access remains necessary, but not so much that the workflow becomes noisy. In practice, that means aligning the review scope with the business owner, application owner, or delegated manager who can answer the simplest test: does this access still support an active need?

Reviews work better when you distinguish between human membership and broader entitlement logic. A group may be acting as a proxy for application authorization, role membership, or downstream access, so removing the wrong member can break legitimate work. That is why the review design should make the consequence of removal visible before the decision is submitted.

What happens after the reviewer responds

Each response should lead to a clear follow-through action: keep the access, remove it, or document an exception that has an owner and an expiry path. If the decision is removal, the revocation should happen automatically or be tracked to completion immediately, because a review that does not change access leaves the risk in place.

Non-response handling matters just as much as affirmative decisions. If reviewers ignore the campaign, the default outcome should not be indefinite access. Treat unanswered items as a control failure that needs escalation or an explicit fallback rule, especially for privileged groups and high-value applications.

Evidence retention is part of the control, not an afterthought. Keep the reviewer identity, the scope reviewed, the decision taken, the date completed, and the remediation outcome so you can show that access was actually governed rather than merely observed. That record is what turns a review into auditable access governance.

Risk and Threat Considerations

Access reviews reduce the chance that stale or excessive access stays active long after it stops being needed. The main risk is not a failed workflow, it is a successful review process that still leaves unneeded access in place because people skip items, approve by habit, or fail to act on exceptions.

Failure mechanism: Reviewers lack context, choose the easiest default response, or never respond, so dormant access, overprivileged access, and unnecessary application assignments remain available for misuse or accidental exposure.

Impact: Excess access increases the blast radius of account compromise, insider misuse, and privilege creep, and it weakens the organisation’s ability to prove that access is being actively governed.

Practitioner Guidance

What to prioritise: Review the highest-risk access first, especially privileged groups, sensitive applications, and access that can propagate into other systems. If a review queue is too broad, reduce scope before increasing frequency, or reviewers will approve without engaging.

What to verify: Confirm that every review has a real owner, a clear revocation path, and a defined default for non-response. If a reviewer cannot explain why the access exists, treat that as a signal that the entitlement design or ownership model is already too weak.

Common mistake: Treating review completion as the control objective. The real objective is verified removal of access that is no longer justified, with exceptions time-bound and traceable.

Practitioner takeaway: The quality of an access review is measured by the access it removes, not by the number of campaigns completed.

Related resources from NHI Mgmt Group

• Guide: Access Reviews and Certification Guide
• How do you review permissions granted to enterprise applications in Microsoft Entra ID?
• How do you use groups for secure access control in Microsoft Entra ID?
• How do you access and review activity logs in Microsoft Entra ID?
• How do you prepare for a Microsoft Entra access review of users' access to an application?