How access reviews work
An access review, also called access certification or attestation, is a structured campaign. The organization gathers a snapshot of who has access to which systems, groups, and entitlements, then routes each item to a reviewer — usually the person's manager or the owner of the application. The reviewer approves access that is still needed and flags access that is not.
Flagged items feed a remediation step: revoking group memberships, disabling accounts, or removing roles. A complete campaign records who reviewed what, when, what they decided, and whether the revocation actually happened, producing a defensible audit trail.
Campaigns are typically run quarterly or semi-annually for sensitive systems, and can also be triggered by events such as a role change or a security incident.
Why access reviews matter
Access rights drift over time. People move between teams, temporary permissions become permanent, and nobody notices until an auditor or an attacker does. Reviews are the systematic counterweight to this drift, enforcing least privilege long after the original grant.
They are also one of the most frequently tested controls in audits. SOC 2, ISO 27001, and internal control frameworks expect documented, periodic reviews of user access with evidence of remediation. A failed or missing review cycle is a common audit finding.
Beyond compliance, every entitlement removed in a review is one less path for lateral movement if an account is compromised.
Running effective review campaigns
The biggest failure mode is rubber-stamping: reviewers bulk-approving hundreds of rows they do not understand. Effective campaigns fight this by translating technical entitlements into business language, highlighting risky or unusual access, and keeping each reviewer's queue small and relevant.
Automation matters at both ends. Collecting entitlements manually from each application does not scale, and approved revocations that never get executed undermine the whole exercise. Closing the loop — from data collection to decision to enforced removal — is what separates a real control from paperwork.
Tools like Monosync automate this cycle by syncing entitlements from connected systems, orchestrating certification campaigns, and generating reports that serve as audit evidence for SOC 2, ISO 27001, KVKK, and GDPR.