Strengthening Microsoft 365 Security with Conditional Access & FIDO2 Authentication

Our client recognised the growing threat of cyber attacks targeting user identities, particularly through phishing, credential theft, and unauthorised access attempts.

While they already had a Microsoft 365 environment in place, their existing authentication methods relied heavily on traditional passwords and basic Multi-Factor Authentication (MFA), which left room for improvement in both security posture and user experience.

The client wanted to:

They needed a solution that would increase security without creating unnecessary friction for end users.

We designed and deployed an enhanced Microsoft 365 security framework centred around Conditional Access and FIDO2 passwordless authentication.

This modern security approach allowed us to significantly improve access security while simplifying the login experience for employees. 

We began by reviewing the client’s existing Microsoft 365 security posture, user access patterns, and business requirements.

Based on this assessment, we implemented a tailored set of Conditional Access policies designed to intelligently control how users access business systems.

These policies included: 

By introducing Conditional Access, we ensured access decisions were based on context, risk, and device compliance—not just usernames and passwords.

This significantly reduced the client’s attack surface. 

To further strengthen identity security, we deployed FIDO2 security keys across the organisation.

This enabled users to securely authenticate without relying on passwords, replacing them with hardware-based cryptographic authentication.

The benefits of FIDO2 included: 

We managed the full rollout process, including: 

This ensured a smooth transition to passwordless authentication with minimal disruption.

Alongside Conditional Access and FIDO2, we implemented additional security improvements to strengthen the wider Microsoft 365 environment.

This included: 

This layered security model provided better visibility into suspicious activity and improved the client’s ability to respond quickly to potential threats.

Following deployment, the client achieved a significantly stronger Microsoft 365 security posture.

Key outcomes included: 

The new security framework now provides a far more resilient identity environment, helping to protect critical business systems and sensitive company data.

By implementing Conditional Access and FIDO2 technology, we helped our client modernise their Microsoft 365 security and move towards a zero-trust approach.

The result was a stronger, smarter, and more user-friendly authentication framework—delivering improved protection against modern cyber threats while maintaining productivity across the business.