Your Microsoft 365 Security Baseline: A 12-Point Checklist

MFA, conditional access, mailbox auditing and the quick wins every tenant should have switched on.

Why it matters

Networks that are planned well are easier to secure, cheaper to run and faster to fix. This guide walks through the decisions our engineers make on real projects.

Before you start

• Document what you have today: sites, users, devices and the applications that matter most.
• Confirm who owns each system and how changes are approved.
• Agree a maintenance window and a rollback plan.

Step-by-step

1. Assess the current state and capture a baseline.
2. Design the target state and review it with stakeholders.
3. Deploy in phases, validating each step.
4. Monitor, document and hand over.

Common pitfalls

Skipping the assessment, changing too much at once and leaving documentation for later are the three mistakes we see most often.

Key takeaways

Plan first, change in small steps, and measure the result. If you'd like a second opinion, our engineers are a call away.