How to prepare Microsoft 365 for NIS2
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Map NIS2 duties to Microsoft 365 controls, set access baselines, maintain ownership reviews, monitor changes and package audit evidence.
TL;DR
NIS2 readiness in Microsoft 365 requires named owners, access and configuration baselines, scheduled reviews, Microsoft Purview audit evidence and reports that connect each duty to proof. Controls include administrator MFA, guest access, mailbox forwarding, Entra ID app permissions and workspace ownership. Significant incidents require early warning within 24 hours and notification within 72 hours.
Original by Rencore, on Rencore. Read the original
This is our own summary, not a republication or full translation.
Governance takeaway
- Makers: Check that apps, agents and workspaces have accountable owners, because ownership records support access decisions and audit evidence.
- Admins/CoE: Set policy-based baselines for MFA, external access, mailbox forwarding and ownership, then schedule reviews and reports to detect drift.
- Security/Compliance: Retain Microsoft Purview audit records for reporting duties and monitor risky sign-ins, external redirects and high-privilege app permissions.
Frequently asked questions
How should Microsoft 365 controls be mapped to NIS2 Article 21?
Map Article 21 duties to concrete controls such as administrator MFA, guest access, mailbox forwarding, Entra ID app permissions and workspace ownership. Assign each control an owner.
What should a Microsoft 365 NIS2 access baseline contain?
The baseline should define the correct state, including administrator MFA, no external mailbox redirects and at least two owners per team. Policies should flag deviations.
What evidence does Microsoft Purview provide for NIS2 reporting?
Microsoft Purview provides the tenant audit log for changes and incidents. Retain it long enough to cover reporting duties and monitor redirects, privileged app permissions and risky sign-ins.