The review process becomes a stale snapshot instead of a live control. That means reviewers cannot reliably see current entitlements, prove timely revocation, or demonstrate least privilege across a fast-changing SaaS estate. Spreadsheets also increase the chance of omission and duplicate data, so the audit trail becomes harder to trust during compliance review.
Why This Matters for Security Teams
Spreadsheet-based access reviews are attractive because they feel fast and familiar, but they rarely keep pace with the way access actually changes in SaaS, cloud, and machine-to-machine environments. A spreadsheet records a point in time, while effective review needs live entitlement data, ownership, and revocation evidence. That gap is especially dangerous when service accounts, API keys, and automated workflows are in scope, because those identities can proliferate far faster than a quarterly attestation process can track.
NHI Management Group research shows the scale of the problem: only 5.7% of organisations have full visibility into their service accounts, and 97% of NHIs carry excessive privileges. That is why audit worksheets often become a formality instead of a control, especially when teams are trying to prove least privilege against a moving target. The issue is not just documentation quality, but control fidelity, because stale exports can hide dormant access, duplicate records, and missing revocations. See Ultimate Guide to NHIs — Regulatory and Audit Perspectives and the NIST Cybersecurity Framework 2.0 for the broader expectation that access governance be demonstrable, current, and repeatable. In practice, many security teams discover review failures only after an auditor asks for evidence that no spreadsheet can reliably reconstruct.
How It Works in Practice
When access audits stay in spreadsheets, the process usually starts with manual exports from IAM, SaaS admin consoles, or ticketing systems. Reviewers then sort, deduplicate, and annotate those rows before sending them for sign-off. That workflow can work for a small, stable application set, but it breaks down when entitlements change daily, owners change jobs, or third-party integrations create hidden access paths. The problem is amplified for non-human identities, where the real control objective is not just who approved access, but whether the identity still needs it right now.
Current guidance suggests replacing spreadsheet-centric review with systems that query authoritative sources at review time, preserve immutable evidence, and support automatic revocation workflows. For NHIs, that means pairing access certification with lifecycle controls, secret rotation, and ownership tracking. The NHI Lifecycle Management Guide and OWASP Non-Human Identity Top 10 both reinforce the need to treat identity sprawl and credential exposure as operational risks, not spreadsheet hygiene issues. Practitioners should look for:
- live entitlement feeds instead of static CSV exports
- named business and technical owners for every identity
- automatic revocation or ticket creation when reviewers mark access as unnecessary
- evidence of last-used time, scope, and privilege level for each credential
- separate handling for human access, service accounts, API keys, and bot identities
This approach aligns better with audit expectations because it produces traceable evidence, but it still depends on clean source systems and consistent identity ownership. These controls tend to break down when access data is spread across unmanaged SaaS tenants, shadow IT tools, and hand-maintained exceptions because there is no single authoritative entitlement source to review.
Common Variations and Edge Cases
Tighter access review controls often increase administrative overhead, requiring organisations to balance stronger evidence against the cost of normalising data from many systems. That tradeoff matters because not every environment can move to fully automated certification at once. Some teams still need spreadsheets for remediation tracking, exception logging, or low-risk applications, but best practice is evolving toward using them only as an interim artifact rather than the control itself.
The biggest edge case is mixed estates where humans, service accounts, and machine APIs are reviewed together. That tends to blur ownership and mask excessive privilege, especially when long-lived credentials are copied into code, CI/CD pipelines, or vendor-managed integrations. NHI Management Group’s Ultimate Guide to NHIs notes that many organisations still lack full visibility into service accounts, which means the spreadsheet often reflects only what teams already know, not what is actually active. For that reason, current guidance suggests using spreadsheets only as a reporting layer over governed identity data, not as the source of truth. The practical limit appears when an audit must prove timely revocation across dozens of SaaS tenants, because manual reconciliation cannot reliably show what changed between export, review, and sign-off.
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 address the attack and risk surface, while NIST CSF 2.0 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Spreadsheet reviews miss NHI visibility and lifecycle control gaps. |
| NIST CSF 2.0 | PR.AA-01 | Access authorization needs current, verifiable evidence not stale exports. |
| NIST CSF 2.0 | PR.AC-4 | Least-privilege review fails when spreadsheets cannot show current entitlements. |
Tie access certification to authoritative identity data and retain review evidence centrally.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on June 11, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
