Microsoft Teams strengthens messaging security by default in January www.bleepingcomputer.com/news/micr…
Microsoft announced that Teams will automatically enable messaging safety features by default to strengthen defenses against content tagged as malicious.
The change will roll out starting January 12, 2026, to tenants still using the default configuration and who haven’t previously modified messaging safety settings.
“We’re improving messaging security in Microsoft Teams by enabling key safety protections by default,” Microsoft told administrators in a Microsoft 365 message center update. “This update helps safeguard users from malicious content and provides options to report incorrect detections.”
Microsoft said the update will activate three key security features: weaponizable file type protection, malicious URL detection, and a system for reporting false positives. As previously noted, organizations that previously customized these settings will see no changes.
After the messaging protections are enabled, users may notice warning labels on messages containing suspicious URLs and the ability to flag incorrect security detections, while messages containing potentially dangerous file types will be blocked entirely.
