Microsoft 365 and Entra ID security review

5 Nov
2026
Ben Liddle
Founder, Nanorisk
1 min
Read
Microsoft 365 and Entra ID security review

Service spotlight: Microsoft 365 and Entra ID security review.

Most UK SMEs now run their entire operation through Microsoft 365. Email, files, identity, device management - it's all there. And in the majority of cases, the tenant has never been formally reviewed against anything.

What we assess covers the areas that consistently produce findings: conditional access policy gaps and MFA enforcement, legacy authentication protocols that remain enabled and actively targeted, over-privileged admin roles, third-party app consent permissions that expand your attack surface quietly over time, guest account sprawl, and insecure tenant defaults that ship enabled and rarely get revisited.

This isn't a theoretical exercise. The controls we examine are the exact ones that appear in incident reports when M365 tenants are compromised - through credential phishing, OAuth abuse, and legacy auth bypass. Getting a clear picture of your configuration is straightforward to scope and delivers concrete, prioritised findings. If you haven't had your tenant reviewed, it's worth doing.

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