Who is accountable for access risk when organisations replace SAP IdM with another identity security approach?

Why This Matters for Security Teams

Replacing SAP IdM does not transfer accountability for access risk. The enterprise still owns who can approve access, how separation of duties is enforced, how emergency access is monitored, and how exceptions are reviewed. That responsibility sits with security, IAM, GRC, and business application owners, while the new platform simply executes policy. This is the same reason identity programs fail when control ownership is assumed to be a tooling decision.

The risk becomes visible during migration because SAP IdM often embeds historical approvals, role design, and certification workflows that teams have relied on for years. If those obligations are not re-established in the target state, controls can appear to exist while actually becoming weaker. NHI Management Group research on the State of Non-Human Identity Security shows how often organisations underestimate operational identity risk, which is a useful warning signal for human access programmes as well. In practice, many security teams discover control ownership gaps only after the migration has already removed the old guardrails.

How It Works in Practice

The right model is to treat the identity platform as an enforcement layer, not the accountable authority. Before cutover, the enterprise should map every access control obligation to a named owner and a tested process. That includes access request approval, periodic certification, privileged access, break-glass workflows, SoD conflict handling, and evidence retention. The platform then automates those workflows, but it does not define the policy itself. Current guidance from NIST Cybersecurity Framework 2.0 and the NIST SP 800-53 Rev. 5 Security and Privacy Controls supports this separation between governance and technical enforcement.

In migration terms, the safest sequence is:

• Inventory all SAP IdM controls, approvals, and certification cadences.
• Assign accountable owners for each control in the target operating model.
• Replicate SoD rules, emergency access approvals, and recertification evidence in the new platform.
• Test decision trails end to end before decommissioning legacy workflows.
• Keep audit evidence available long enough to satisfy internal and regulatory review.

That approach aligns with the broader NHI control lessons in Top 10 NHI Issues and the OWASP Non-Human Identity Top 10, where unmanaged privilege and weak lifecycle controls are recurring failure modes. These controls tend to break down when the migration is compressed into a technical cutover and the organisation has not rebuilt approval ownership for every business application.

Common Variations and Edge Cases

Tighter access governance often increases migration effort, requiring organisations to balance auditability against speed of transition. That tradeoff is real, especially when SAP IdM has accumulated custom rules, local exceptions, and application-specific approval chains over many years. Best practice is evolving, but there is no universal standard for transferring those controls automatically to a new platform.

Some edge cases need special handling. Shared service centres may manage approvals centrally while application owners retain risk sign-off. In highly regulated environments, internal audit may require parallel operation of old and new certification cycles until evidence quality is proven. Emergency access is another common gap: if break-glass accounts move without clear ownership, the platform can be compliant on paper while still creating ungoverned privilege. The safer posture is to preserve the control objective even if the workflow changes.

For teams also dealing with non-human access, the same principle applies in Ultimate Guide to NHIs and the 2024 ESG Report: Managing Non-Human Identities: ownership must remain explicit, because tooling does not own risk. The practical rule is simple, even when implementations are not: if no business owner can explain who approves, reviews, and overrides access, the migration has created a control gap rather than a new identity strategy.

Related resources from NHI Mgmt Group

• How should security teams use identity observability to reduce access risk in complex enterprises?
• How should security teams delegate access governance across large engineering organisations without creating cross-team risk?
• Who is accountable for access risk during an SAP IDM migration?
• How should organisations prepare for SAP user conferences when identity security and application access governance are the main concerns?