Microsoft Makes Teams ‘Secure by Default’ Starting January 2026

Microsoft announced that starting January 12, 2026, Teams will become “secure by default” by enabling three protections for organizations using standard configurations: blocking dangerous file types, real-time scanning of URLs for phishing/malware, and user reporting of false positives. Admins can opt out by adjusting settings in the Teams Admin Center before the deadline, but otherwise the controls will auto-apply to reduce AI-driven phishing and malware risks while providing a feedback loop to refine detections.