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Understanding the Windows Defender Score in Microsoft 365

Chad Brown

Feb 11 2025

2 min read

The Windows Defender score, part of the Microsoft 365 Defender suite, is a valuable security metric designed to help organizations gauge and improve their security posture. It provides a comprehensive assessment of your security configuration and practices across endpoints, identities, apps, and data within your Microsoft 365 environment.

What is the Windows Defender Score?

The Defender score is a component of Microsoft Secure Score, a broader security management tool available in the Microsoft 365 Security & Compliance Center. While Secure Score assesses various facets of security, the Defender score homes in on endpoint protection. It reflects how well Windows Defender Antivirus, Microsoft Defender for Endpoint, and related features are configured and performing. A higher score indicates stronger security measures.

Why Does It Matter?

Cyberattacks are constantly evolving, and endpoint vulnerabilities remain one of the most exploited entry points for malicious actors. The Defender score helps identify weaknesses and provides actionable insights to close security gaps. By proactively monitoring and improving this score, organizations can reduce their risk of breaches and enhance resilience against advanced threats.

How is the Score Calculated?

The Defender score evaluates security settings, device configurations, and active threat protection measures. Key factors include:

Endpoint Protection: Are Windows Defender Antivirus and Defender for Endpoint enabled and functioning as expected?
Configuration Baselines: Are devices configured in compliance with Microsoft’s recommended security baselines?
Threat Remediation: How effectively are threats being detected, contained, and mitigated across devices?
Updates and Patching: Are Windows updates and security patches applied promptly?

Each factor contributes to your overall score, with recommendations prioritized by impact and implementation difficulty.

Benefits of Optimizing the Defender Score

Enhanced Security: Addressing recommendations boosts your defenses against malware, phishing, and ransomware.
Proactive Monitoring: Continuous tracking ensures that vulnerabilities are addressed before they can be exploited.
Compliance: Meeting Defender’s guidelines helps align with industry standards and regulatory requirements.
Actionable Insights: The score provides specific steps to improve, tailored to your organization’s environment.

Conclusion

The Windows Defender score is a cornerstone of robust endpoint security within Microsoft 365. By regularly monitoring and optimizing it, organizations can stay ahead of threats, strengthen their security posture, and confidently protect their users and data. Start exploring your Defender score today to take the first step toward a more secure digital workspace.

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About the Author

Chad Brown

Chad Brown is a Senior Network Consultant at Sikich, assisting client in achieving their business objectives through technology and trusted advice. He holds a Bachelor’s of Science in Information Technology from University of Phoenix, as well as several industry certifications. His primary area of focus revolves around server infrastructure and Microsoft’s Cloud services.