Microsoft Teams is finally boosting security controls to let admins block custom file extensions
Microsoft is set to give admins more control over specifically which file types can – and can't – be shared on Teams.
Microsoft Teams is set to enhance its security controls, giving administrators the ability to block specific file extensions sent through the platform, a move aimed at preventing the spread of malware. This upgrade to Microsoft's Weaponizable File Protection feature, which has been rolled out to Teams, will allow admins to customize which file types are prohibited, either by following a Microsoft-recommended default list or by setting their own security requirements.
The updated feature is scheduled for a November 2026 rollout, providing administrators with greater control over the types of files that can be shared within the workplace collaboration app. Microsoft's decision to implement this change comes in the wake of a rise in Teams attacks, which often bypass secure email gateways due to the perceived legitimacy of colleague-initiated chats.
By allowing administrators to block certain file types, Microsoft aims to curb the likelihood of malicious files being spread through the platform.
Other upcoming features for Microsoft Teams include simultaneous screen sharing for two presenters, breakout room support for Android users, and a Meeting Shared Files window that will enable users to easily access attachments from specific meetings.
Written by urgent.news from TechRadar's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
