Security audits for NIS2 and ISO 27001 compliance

Regulations like NIS2 and standards like ISO 27001 increasingly demand evidence, not intentions. A documented, repeatable security audit of your Microsoft environment is one of the most practical ways to produce that evidence.

The shift to evidence

Both NIS2 and ISO 27001 share a theme: it is no longer enough to say you manage risk — you have to demonstrate it. That means documented controls, measurable posture and the ability to show improvement over time. A structured audit produces exactly this kind of artefact.

What NIS2 expects

NIS2 raises the bar on cybersecurity risk management for a broad range of organisations, with real accountability at management level. Among its themes: risk analysis, access control, incident handling readiness and supply-chain security. A Microsoft-environment audit contributes directly to several of these — particularly access control and identity, where Entra ID sits.

How an audit maps to ISO 27001

ISO 27001 annex A includes controls on access management, privileged access, logging and monitoring, and configuration. A Microsoft security audit provides technical evidence behind these controls: who has privileged access, whether MFA is enforced, how logs are retained, how configuration compares to a baseline. That evidence feeds directly into your ISMS documentation and an external assessment.

Why "defensible" matters here

For both regimes, the value of an audit is only as good as its traceability. A score with a documented methodology, controls mapped to recognised frameworks, and a per-control reference is one you can put in front of an assessor. A vague checklist is not.

Repeatability and trend

Compliance is not a one-off. Both NIS2 and ISO 27001 assume ongoing management. Running the same audit periodically — and comparing results over time — demonstrates continuous improvement, which is exactly what assessors and regulators want to see. "We were at 54%, we are now at 78%, here is the evidence" is a powerful statement.

Practical starting point

1. Run a baseline audit across Entra ID and Microsoft 365.
2. Map the findings to the relevant ISO 27001 annex A controls or NIS2 themes.
3. Remediate fundamentals first, tracking the weighted score.
4. Re-audit on a schedule and keep the reports as evidence.

Transposition status and why it still bites

NIS2 is an EU directive, which means it takes effect through each member state's national law rather than directly. Transposition has been uneven and, in several states, late — but the obligations land on in-scope essential and important entities regardless of the local timetable, and the management-liability provisions give boards a direct reason to care. Treat NIS2 as in force for your risk-management measures now, whatever the local statute's exact date.

DORA overlap for financial entities

If you are a financial entity or an ICT provider to one, DORA (EU 2022/2554) has applied since January 2025 and overlaps heavily with NIS2 on the identity layer: ICT risk management (Art. 9) and detection (Art. 10) map onto the same Entra ID controls — access control, MFA, logging — that NIS2 Article 21 asks for. Auditing the tenant once against both, control by control, avoids running two parallel assessments over the same settings.