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Microsoft Security

Supercharge your security operations

Accelerate security operations center (SOC) response with incident-level visibility and automatic cyberattack disruption with extended detection and response (XDR).

Learn how to close security gaps

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.

Get true visibility with one solution

Build a unified defense across your multiplatform, multicloud environment.

Rapidly respond with XDR-prioritized incidents

Remediate cyberthreats efficiently with a complete view of the cyberattack chain informed by 65 trillion daily signals and prioritized investigation and response at the incident level.

Disrupt advanced cyberattacks at machine speed

Stop lateral movement of advanced cyberattacks like ransomware and business email compromise with advanced AI capabilities that automatically isolate compromised devices and user accounts.

Unify security and identity access management

Protect your hybrid identities and identity infrastructure from credential theft and other cyberthreats with the seamless integration of Microsoft Entra ID (formerly Azure Active Directory) and Defender XDR.

Transform SOC productivity with generative AI

Respond to cyberthreats faster with step-by-step guidance, empower any analyst to build queries in natural language, and reverse-engineer adversarial scripts in seconds. Copilot is available embedded in Microsoft Defender XDR for Copilot customers.

Stop cyberattacks and coordinate response
across domains with XDR

Optimize SOC operations with Microsoft Defender XDR

Empower security teams to effectively detect and respond to cyberthreats with expanded visibility, incident-level investigation tools, and built-in automation.

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Explore Microsoft Defender XDR

Secure your multiplatform endpoints, hybrid identities, email, collaboration tools, apps, and cloud with unified XDR.

Endpoint security

Discover and secure endpoint devices across your multiplatform enterprise with industry-leading endpoint detection and response (EDR).

Identity security

Protect your hybrid identities and workload scripts with cloud-based intelligence sharing.

Email and collaboration security

Safeguard your emails, documents, and collaboration tools from advanced cyberthreats like phishing and ransomware.

Cloud app security

Secure your cloud apps with unified visibility, data protection, and posture management.

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Microsoft Defender Experts for XDR

Extend your security operations center (SOC) coverage and reduce your risk of compromise with a managed XDR service that provides triage, investigation, and incident response to quickly and effectively stop cyberattackers.

See Copilot in Microsoft Defender XDR

Watch how Copilot helps you investigate and complete complex tasks such as cyberthreat hunting, reverse-engineering malware, and incident reporting.

Unified security operations platform

Secure your digital estate with the only security operations (SecOps) platform that unifies the full capabilities of extended detection and response (XDR) and security information and event management (SIEM).

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Unified portal

Detect and disrupt cyberthreats in near real time and streamline investigation and response.

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Industry recognition

Microsoft Security is a recognized industry leader.


A leader in XDR

Microsoft was named a Leader in The Forrester New Wave™: Extended Detection And Response (XDR), Q4 2021.12


Industry-leading protection

Microsoft Defender XDR (formerly Microsoft 365 Defender) demonstrated industry-leading protection in MITRE Engenuity’s independent ATT&CK® Enterprise Evaluations.

The Total Economic Impact™ Of Microsoft Defender XDR

Learn about the potential return on investment that enterprises may realize by deploying Microsoft Defender XDR (formerly Microsoft 365 Defender).3

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See why customers trust XDR from Microsoft

“A single layer of detection isn’t strong enough and is prone to some level of false positive…On the other hand, Microsoft Defender XDR (formerly Microsoft 365 Defender) correlates signals across endpoints, email, documents, identity, apps, and more.”

- Krzysztof Kuźnik, Product Owner, ING

Additional XDR resources


Microsoft XDR Infographic

Get an overview of how XDR stops cyberattacks and coordinates responses across assets.


Automatically disrupt ransomware with Microsoft Defender XDR

Learn how built-in XDR cyberattack-disruption capabilities help stop the progression of advanced cyberattacks.


Microsoft Defender XDR Blog

Explore the latest Microsoft Defender XDR updates, news, and best practices.


Benefits of Automated XDR Platforms

Get strategies for addressing the security labor shortage with AI and learn how to strengthen identity and access security with comprehensive XDR.

Protect everything

Make your future more secure. Explore your security options today.

  • [1] Forrester, Forrester Wave, and Total Economic Impact are trademarks of Forrester Research, Inc.
  • [2] The Forrester New Wave™: Extended Detection And Response (XDR) Providers, Q4 2021, Allie Mellen with Joseph Blankenship, Alexis Tatro, Peggy Dostie, October 2021.
  • [3] The Total Economic Impact™ Of Microsoft Defender XDR (formerly Microsoft 365 Defender), a commissioned study conducted by Forrester Consulting, April 2022.

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