Microsoft is introducing a new feature that allows security administrators to block external users from messaging or inviting team members in Microsoft Teams. This enhancement, set to roll out in January 2026, aims to strengthen security against social engineering and cybercrime attacks. #MicrosoftTeams #DefenderforOffice365
Keypoints
- New Teams security feature enables blocking external users from communication.
- The feature integrates with Defender for Office 365 and the Microsoft Defender portal.
- Organizations must enable specific admin settings to activate the blocking capability.
- Admins can manage up to 4,000 blocked domains and 200 email addresses.
- The update aims to mitigate social engineering attacks by cybercriminal gangs, including ransomware groups.