- Microsoft automatically enables security features for business users
- Updates include malicious URL blocking and phishing detection
- Any users who would prefer these features to be disabled can do so in Settings
Microsoft is strengthening its security posture for businesses, and starting January 12, 2026, Microsoft Teams will automatically enable critical email security features, aiming to protect users who rely only on standard security configurations.
The new administrative update is part of Microsoft’s evolution toward a “security by default” culture, protecting organizations, reducing the attack surface and raising standards at every level.
“We’re improving email security in Microsoft Teams by enabling key security protections by default,” Microsoft informed admins in an update to the Microsoft 365 Message Center. “This update helps protect users from malicious content and provides options to report incorrect detections.”
Secure by default
The update will bring changes for all tenants with default email security settings, with three protections set to be automatically enabled.
The first of these is “Weaponable File Type Protection”: a feature that blocks messages containing dangerous file types or malicious URLs in Teams channels and chats, especially those that are high-risk vectors for malware execution.
Another enhanced security provision includes malicious URL detection for real-time link analysis to flag suspicious sites and domains – additional protection against phishing attacks. The advent of AI has led to a significant increase in the frequency and severity of phishing attacks, so additional protections will seek to mitigate them.
The latest feature added is a feedback mechanism that flags incorrect security detections, encouraging end users to detail false positives so Microsoft can calibrate threat detection algorithms.
Any admins who prefer to keep the most basic security arrangements should review the settings before January 12, which they can do by going to the Teams admin center, then Messaging > Email settings > Email security.
Via: Bleeping Computer
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