Message CenterFeature updateAdmin impact

MC1200576 — Teams admin center: Messaging safety defaults changing to "On" by default

MC1200576Microsoft TeamsplanForChangeUpdated: 19 December 2025

Starting January 12, 2026, Microsoft Teams will enable messaging safety features by default, including weaponizable file type protection, malicious URL protection, and reporting incorrect detections. Existing custom settings remain unchanged. Admins should review and adjust settings before this date and inform helpdesk staff accordingly.

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Applies to: Microsoft Teams
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).