Manual access reviews often fail because they are slow, inconsistent, and hard to evidence across multiple systems. Different teams may use different templates, dates, and approval criteria, which makes it difficult to prove the control operated consistently. That weakens both ITGC testing and SOX reliance, especially where identity changes happen frequently.
Why This Matters for Security Teams
Manual access reviews across ERP landscapes break down because the control depends on human consistency in an environment that changes faster than review cycles. Approvers may not see the same entitlements, may interpret risk differently, and may miss inherited access tied to roles, subsidiaries, or interface accounts. That creates weak evidence for ITGC testing and makes SOX reliance fragile when auditors ask whether the review was both complete and repeatable. The problem is not just speed, but control fidelity.
NHI Management Group’s Ultimate Guide to NHIs notes that NHIs outnumber human identities by 25x to 50x in modern enterprises, which helps explain why manual review habits that barely scale for people fail even harder when machines, integrations, and ERP service access are involved. Current guidance from the NIST Cybersecurity Framework 2.0 still expects organisations to demonstrate repeatable governance, not just one-off attestations. In practice, many security teams discover review gaps only after auditors, exceptions, or dormant access issues have already exposed the weakness, rather than through intentional control design.
How It Works in Practice
In ERP environments, access reviews usually span role assignments, direct entitlements, privileged functions, delegated approvals, and technical accounts. Manual processes often force reviewers to work from exported spreadsheets, point-in-time screenshots, or ticket comments, which makes it hard to reconcile what was actually granted in each system. The control becomes especially brittle when HR, finance, and IT each maintain separate ownership models for the same user, role, or account.
A stronger approach is to standardise review inputs and automate evidence capture from the source of truth. That means pulling a complete entitlement inventory, normalising account-to-role mappings, and attaching timestamps, reviewer identity, decision outcome, and remediation status to each item. Where access is tied to non-human identities, the review should also distinguish between interactive access and service-to-service access, because approval criteria differ. The Ultimate Guide to NHIs — Regulatory and Audit Perspectives is useful here because it frames why auditors care about traceability, not just the existence of a review.
- Use one entitlement catalogue across ERP modules so reviewers see consistent data.
- Trigger reviews by risk, role change, or material access change rather than only by calendar.
- Record business justification and remediation evidence in a system that can be re-audited.
- Separate human user access from service accounts, APIs, and integration identities.
The OWASP Non-Human Identity Top 10 reinforces why this matters: unattended or overprivileged non-human access is a recurring failure mode, and manual review alone does not reliably surface it. These controls tend to break down when ERP entitlements are distributed across multiple instances and local custom roles because reviewers cannot reliably reconstruct effective access from fragmented exports.
Common Variations and Edge Cases
Tighter access review controls often increase operational overhead, requiring organisations to balance auditability against reviewer fatigue and business disruption. That tradeoff becomes visible in ERP programmes where many entitlements are legitimate but rarely used, and where revoking access too aggressively can interrupt close, procurement, or payroll workflows. Best practice is evolving, and there is no universal standard for how often every ERP entitlement should be re-certified.
Some organisations move to exception-based reviews, where only high-risk or changed access is manually re-approved while low-risk entitlements are auto-attested under policy. Others use governance tooling to aggregate reviews across SAP, Oracle, and adjacent systems so that one evidence trail covers the full access path. The 52 NHI Breaches Analysis and the Top 10 NHI Issues both underline a recurring pattern: when entitlement ownership is unclear, reviews become ceremonial rather than preventive.
Edge cases matter most when ERP access is inherited through composite roles, third-party support accounts, or integration users that do not map cleanly to a named employee. In those environments, manual review breaks down because the reviewer is asked to approve access without enough context to judge whether it is still necessary or even fully visible.
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 AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Covers review and rotation weaknesses in non-human access governance. |
| NIST CSF 2.0 | PR.AC-4 | Addresses access permissions management and least privilege verification. |
| NIST AI RMF | Supports governance, traceability, and accountability for automated decision workflows. |
Define accountable review processes and evidence retention for access governance decisions.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on June 24, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
