How should organisations handle third-party SaaS access during compliance reviews?

What compliance reviews should actually verify in third-party SaaS access

Compliance review is not just a vendor questionnaire. The useful check is whether third-party SaaS access still matches an approved business purpose, a named owner, a current contract or service need, and an enforceable offboarding path. That means reviewing supplier users, delegated administrators, API connections, and support access as separate access relationships, not one combined “vendor account” bucket.

A review is strongest when it compares policy intent to live entitlement state. If the vendor can still authenticate after the service ends, or if a dormant integration can still reach sensitive data, the control has failed even if the annual review was signed off on time.

One practical example is Third-Party, B2B and Contractor Access Guide, which treats sponsor ownership, time limits, least privilege, and offboarding as the core of third-party access governance. For organisations reviewing SaaS access, that is the right model: review who has access, why they have it, and what removes it.

Why third-party SaaS access drifts out of compliance

Third-party SaaS access drifts because the approval event and the access lifecycle are often separated by months or years. Vendors change staff, integrations expand, support teams add temporary permissions, and no one revisits the original justification. Over time, compliance records can show an approved relationship while the live system contains broader, older, or inherited access.

This is especially common with delegated admin rights, OAuth-connected apps, shared support accounts, and “break glass” access that was never retired. A good review therefore asks whether the access is still tied to a current service obligation, whether the permissions are still minimal, and whether the organisation can actually revoke them when the contract or use case ends.

For lifecycle discipline, NHI Lifecycle Management Guide is directly relevant because the same provision, rotation, and offboarding logic applies to third-party SaaS connections. The point is not the label on the identity, it is whether the access can be discovered, owned, reviewed, and removed before it becomes residual exposure.

How to evidence control effectiveness during the review

Auditors and internal reviewers usually need more than a list of approved vendors. They need evidence that the organisation can reconcile access approvals to the actual SaaS estate. The strongest evidence is a current inventory of third-party users, privileged roles, service connections, and token-based integrations, paired with dated review decisions and revocation records.

When the environment uses connected apps or federated access, the review should also check whether access is audience-scoped, time-bounded, and attributable to a named owner. If the supplier cannot explain each live permission or if the organisation cannot produce a clean removal record, the control should be treated as incomplete, not merely documented.

At a broader governance level, Access Reviews and Certification Guide is useful because it focuses on closed-loop remediation, not rubber-stamped certification. That is the right standard for third-party SaaS: the review must produce actual entitlement change, not just compliance evidence.

Practitioner Guidance

What to prioritise: Start with third parties that have production data access, delegated administrative rights, or non-expiring API tokens. Those are the relationships most likely to create both compliance gaps and real breach exposure if they are left untouched.

Decision rule: If the third-party access cannot be tied to a current business owner and a revocation path, treat it as an exception requiring immediate remediation. If the access is justified but still broad, narrow it before the next certification cycle rather than waiting for annual review.

What to verify: Confirm that every supplier account, integration, and support path has an owner, an expiry or review date, and an offboarding trigger. The review is only credible when the system state matches the paperwork.

Practitioner takeaway: The control objective is to make third-party SaaS access lifecycle-managed and revocable, because compliance evidence without actual offboarding is just documentation drift.

Related resources from NHI Mgmt Group

• How should organisations handle third-party access when collaboration must stay open but compliance risk is rising?
• When should organisations treat third-party SaaS access as privileged access?
• How should security teams handle third-party access when vendors and SaaS tools are part of the attack path?
• What breaks when organisations leave third-party access standing during geopolitical escalation?