Microsoft 365 Security for SMBs — M365 Hardening & Baseline
Microsoft 365 security baseline for small and mid-sized businesses. MFA, Conditional Access, Defender for Office 365, DMARC, audit logging, and insurance-ready documentation.
Microsoft 365 security, done right — and documented.
Key facts
What's included
Why this matters now
Frequently asked questions
Cybersecurity · Microsoft 365
A complete M365 security baseline for SMBs: identity, email, endpoints, and data — hardened, monitored, and ready for your next cyber insurance renewal.
Four pillars of a real M365 security baseline. Every item is configured, tested, and documented.
Cyber insurance carriers now require documented MFA, EDR, and email security as a condition of coverage. A misconfigured M365 tenant can be the difference between a paid claim and a denied one.
Microsoft ships M365 with sensible defaults — but "sensible" is not "hardened." Conditional Access, Defender policies, audit logging, and DMARC enforcement all require deliberate configuration. This service closes the gap between out-of-the-box and audit-ready.
Pairs naturally with our cybersecurity foundations service and the broader cloud advisory roadmap. For a deeper read, see the SMB cybersecurity checklist.
Frequently Asked Questions
What Microsoft 365 license do I need for a real security baseline?
Business Premium is the practical floor — it includes Defender for Office 365 P1, Defender for Endpoint, Intune, and Conditional Access. Business Standard can be hardened, but you'll spend more on add-ons than you'd save vs upgrading.
How long does an M365 hardening project take?
Most SMB tenants (10–100 seats) go from kickoff to fully hardened in 2–4 weeks. Larger or more complex environments (multi-domain, hybrid AD, regulated industries) typically run 4–8 weeks.
Will hardening break things for my users?
Done correctly, no — every change ships through a pilot group first, with clear comms and a rollback plan. The most common 'breakage' is shadow IT (legacy app integrations using basic auth) — those need to be migrated to modern auth as part of the project.
Do you provide documentation for cyber insurance applications?
Yes. Every engagement ends with a baseline report mapping your tenant settings to common cyber insurance questionnaires (CIS Controls, NIST CSF, MFA coverage, EDR coverage, backup posture).
Can you work alongside our existing MSP?
Yes. The most common arrangement: I implement the security baseline and document it, your MSP runs day-to-day support and handles ongoing changes against the documented baseline.