Elevate your security with unified visibility, investigation, and response across the cyberattack chain with an industry-leading extended detection and response (XDR) solution.

Microsoft Defender XDR empowers your SOC to effectively investigate and remediate cyberthreats with the following capabilities: Extended: Get true visibility with incidents that span endpoints, identities, email, collaboration tools, SaaS apps, data loss insights, and cloud.

Microsoft Defender XDR is a unified pre- and post-breach enterprise defense suite that natively coordinates detection, prevention, investigation, and response across endpoints, identities, email, and applications to provide integrated protection against sophisticated attacks.

Extended detection and response (XDR) is a unified security incident platform that uses AI and automation to efficiently protect against advanced cyberattacks.

Lists the new features and functionality in Microsoft Defender XDR

Learn about the robust security solutions in Microsoft Defender XDR so that you can better protect your enterprise across attack surfaces.

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Read how Microsoft Defender Experts for XDR, a managed extended detection and response (MXDR) service, helps stop cyberattackers and prevent future compromises.

Enhance your security with Xcitium's Extended Detection & Response (XDR). Detect, analyze, and respond to advanced threats across your entire IT ecosystem with unified protection.

How to pilot and deploy Microsoft Defender XDR and its components in your production Microsoft 365 tenant.

To earn this Microsoft Applied Skills credential, learners demonstrate the ability to use Microsoft Defender XDR to detect and respond to cyberthreats.

Get updates about Microsoft Defender XDR, as well as helpful tips and guides to make sure you get the most out of your experience.

Coordinate cyberthreat response across your entire digital estate and quickly stop cyberattacks with Microsoft Defender XDR (formerly Microsoft 365 Defender), a unified, AI-powered XDR solution. Accelerate security operations center (SOC) response with incident-level visibility and automatic cyberattack disruption with extended detection and response (XDR).

Defender XDR (formerly Microsoft 365 Defender) is a unified pre- and post-breach defense suite that includes Microsoft Defender for Cloud Apps, Microsoft Defender for Endpoint, Microsoft Defender for Identity, and Microsoft Defender for Office 365. Security teams can spend much of their time investigating security alerts, rather than using their expertise for proactive security measures.

March 14, 2025 - Microsoft Defender XDR delivers comprehensive cyber risk management and security solutions to counter sophisticated cyber threats effectively.

The Defender portal emphasizes quick access to information, simpler layouts, and bringing related information together for easier use. It includes Microsoft Defender XDR and features and capabilities of other Microsoft security solutions that you have provisioned access to.

September 5, 2025 - Microsoft Defender XDR (formerly Microsoft 365 Defender) is a cloud-based extended detection and response (XDR) security solution that unifies multiple Microsoft Defender products to strengthen security and accelerate response times, all within a single pre and post-breach defence suite.

Microsoft Defender XDR is a unified business defense suite, both pre- and post-breach, that includes Defender for Cloud Apps, Defender for Endpoint, Defender for Identity, Defender for Office 365, Vulnerability Management, and Defender for Cloud. It serves to coordinate detection, prevention, investigation and response across endpoints, identities, emails and applications, offering integrated protection against the most sophisticated attacks.

Microsoft 365 Defender is an automated, cross-domain security solution that leverages the power of the Microsoft 365 security portfolio to automatically analyze threat data across domains, building a complete picture of each attack in a single dashboard. Microsoft 365 Defender is part of Microsoft’s XDR (extend, defend, recover) strategy and aims to provide global visibility into the data generated by existing security solutions.