Microsoft Defender XDR is a unified pre- and post-breach defense suite that helps protect your organization across endpoints, identities, email, data, and applications.

Instead of managing separate tools in silos, Defender XDR brings them together to coordinate detection, prevention, investigation, and response. It correlates signals from multiple Microsoft security products you’ve licensed and provisioned access to, including:

• Microsoft Defender for Endpoint
• Microsoft Defender for Office 365
• Microsoft Defender for Identity
• Microsoft Defender for Cloud Apps
• Microsoft Defender Vulnerability Management
• Microsoft Defender for Cloud
• Microsoft Entra ID Protection
• Microsoft Data Loss Prevention
• App Governance
• Microsoft Purview Insider Risk Management
• Microsoft Security Exposure Management

By joining these signals, Defender XDR helps your security team see how an attack entered the environment, what it has affected, and how it is currently impacting the organization. It then uses automated actions to prevent or stop attacks and self-heal affected mailboxes, endpoints, and user identities.

Defender XDR is designed to help your team move from isolated alerts to a clear, end-to-end view of each attack.

Key ways it improves detection and response:

• Combined incidents queue: Instead of handling dozens of separate alerts, Defender XDR groups related alerts, suspicious events, and impacted assets into a single incident. This helps analysts focus on what is most critical and understand the full attack scope faster.
• Cross-product single pane of glass: The Microsoft Defender portal (https://security.microsoft.com) provides a central view of detections, impacted assets, automated actions taken, and related evidence in one place.
• Automatic attack disruption: Defender XDR correlates high-confidence signals from multiple workloads and can automatically apply containment actions to stop in-progress attacks and limit lateral movement. For example, if a malicious file is detected on an endpoint, it can instruct Defender for Office 365 to scan and remove that file from all email messages, and block it on sight across the Microsoft 365 security suite.
• Self-healing capabilities: Using AI-powered automatic actions and playbooks, Defender XDR can remediate compromised devices, user identities, and mailboxes back to a secure state, leveraging the built-in remediation capabilities of each suite product.

Overall, this coordinated approach helps your team move from reactive alert handling to more proactive, integrated incident management.

Defender XDR is built to help security teams go beyond basic alert triage and into deeper analysis and threat hunting.

Key data and hunting capabilities include:

• Cross-product data correlation: Defender XDR joins data from endpoints, identities, email, and cloud apps so you can see how an attacker moves across different parts of your environment.
• 30 days of historic raw signals: It provides query-based access to 30 days of historic raw signals and alert data from:
  • Defender for Endpoint
  • Defender for Office 365
  • Defender for Identity
  • Defender for Cloud Apps
• Custom threat hunting queries: Your security team can use its own organizational knowledge to create custom queries over this data to hunt for signs of compromise, suspicious behavior, or missed detections.
• Incident context and narrative: Defender XDR helps “tell the story” of an attack by joining alerts, behaviors, and impacted assets into a single incident, giving analysts the context they need to make better decisions.

These capabilities help your team reimagine how they investigate threats, moving from isolated log reviews to connected, cross-domain threat hunting.