Microsoft Defender XDR will add six new built-in alert tuning rules for Microsoft Defender for Endpoint starting February 8, 2026, to reduce low-priority alerts. Rules are visible for review until February 18, then activate by default but can be disabled anytime by admins. No action needed for default use.
Applies to: Microsoft Defender XDR
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).