Microsoft 365 can provide a strong security foundation, but simply using the platform does not mean every important control is configured appropriately. Security depends on how identity, access, devices, administration and threat protection are brought together.
Start with identity
User identity is one of the most important control points in a modern Microsoft environment. Multi-Factor Authentication can make stolen passwords less useful to an attacker, while Microsoft Entra Conditional Access can apply access decisions using signals such as the user, device and other conditions.
Privileged and administrative accounts deserve particular attention. Organisations should understand who has elevated access, whether those permissions are genuinely required and how administrative access is protected.
Know the condition of the devices accessing your data
Microsoft Intune can manage and secure organisational devices and applications. Device compliance policies can evaluate requirements such as operating-system versions, encryption and other security settings.
Intune and Microsoft Entra can also work together so device compliance becomes a signal in Conditional Access decisions. This connects endpoint management with access control instead of treating them as separate security problems.
Review email, endpoints and threat visibility
Email and endpoints remain important attack surfaces. Microsoft Defender technologies can form part of a broader approach to detecting and responding to threats across Microsoft environments.
The important question is not simply whether a Defender product is licensed. Organisations should understand which capabilities are available to them, what has been configured and whether alerts and security information are being reviewed effectively.
Security is a configuration and operating model
- Review MFA and Conditional Access rather than assuming identity is protected.
- Understand privileged accounts and reduce unnecessary administrative access.
- Establish device-management and compliance requirements where appropriate.
- Review Microsoft Defender and email-security capabilities available in your licensing.
- Create a process for reviewing risks, alerts and security improvements over time.
A useful Microsoft 365 security review should identify what is already working, where meaningful gaps exist and which improvements should be prioritised. The goal is not to enable every possible setting — it is to build controls that reduce risk without unnecessarily disrupting the organisation.