Summary 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. Message ID: MC1228325 Published: Feb …
Summary The Semi-Annual Enterprise Channel option will be retired from the Office Customization Tool starting April 15, 2026, completing by April 20, 2026. Existing configurations remain unchanged, but new deployments will only offer Current Channel and Monthly Enterprise Channel options. No admin action is required. Message ID: MC1249427 Last Updated: Apr 9, 2026 Published Mar …