(Preview) Microsoft Defender now integrates with Microsoft Agent 365

April 2026

• (Preview) Microsoft Defender now integrates with Microsoft Agent 365 to provide comprehensive security for AI agents onboarded to A365. Microsoft Defender discovers agents registered with Agent 365 and provides visibility into agent inventory and configuration. Agents that integrate the Microsoft Agent 365 SDK enable discovery, threat detection and investigation through near‑real‑time detections, alerts, and Advanced Hunting. Agents onboarded through the Microsoft Agent 365’s Agent Tooling Gateway (ATG) benefit from by real-time protection, which evaluates and can block unsafe agent-initiated tool actions before execution. For more information, see Protect AI agents using Microsoft Defender.
• (Preview) The AIAgentsInfo table in advanced hunting now includes additional columns that provide deeper visibility into AI agents operating in your Microsoft 365 environment. These fields expand coverage beyond Copilot Studio to all agent types, including Microsoft Foundry, third-party marketplace, and custom line-of-business agents.
• Microsoft Defender Experts for XDR customers can now see Defender Experts as a distinct entry in the Microsoft Defender portal navigation menu. This feature adds to the existing home page status card as in-portal experiences that provide consistent and predictable access to the service.