Microsoft Defender: Automated investigation and response (AIR) integrated into antivirus with manual triggering removed

Starting September 1, 2026, Microsoft Defender will remove manual triggering and the standalone experience of automated investigation and response (AIR). AIR’s protection is integrated into always-on antivirus, running automatically. Organizations using AIR in playbooks or scripts must update them before this date; full antivirus scans replace manual AIR investigations. What and Why As of September 1, 2026, automated investigation and response (AIR) will no longer run as a separate investigation experience or be available for manual triggering in Microsoft Defender. The protection capabilities of AIR are already embedded within Microsoft Defender’s always-on antivirus protection stack today. Detection and response run automatically as part of default protection, without requiring a separate investigation workflow. This change is part of our ongoing “shift left” effort to lift the onus of protection from customers by automating detection and response processes, helping ensure consistent outcomes across endpoints without reliance on a separate, manually initiated investigation experience. With this update, the standalone AIR investigation experience is removed. For on-demand investigations, teams can run full antivirus scans as needed. Rollout Schedule Transition (Worldwide, GCC, GCC High, DoD): Beginning and completing in early September 2026 Impact on Your Organization Who is affected Admins and security teams using Microsoft Defender for Endpoint and Microsoft Defender XDR Platforms/Services Microsoft Defender for Endpoint across supported platforms What will happen Manual triggering of automated investigation and response (AIR) will no longer be available. AIR will no longer run as a separate investigation experience. Detection and response will occur automatically as part of always-on antivirus protection. Full antivirus scans replace manual AIR investigations for on-demand analysis. Any playbooks, scripts, or integrations that initiate AIR will stop working after September 1, 2026, and must be updated before that date. Protection remains enabled by default. Action Required / Recommendations If you are not using AIR manually or through automation, no action is required to maintain protection. Action is required for organizations using AIR in playbooks, scripts, or integrations, as these will no longer function after September 1, 2026. Review and update any playbooks, scripts, or integrations that initiate AIR before September 1, 2026. Replace AIR-based workflows […]

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