499892 – Microsoft Teams: Weaponizable File Type Protection for Teams Chat and Channels

Product:

Teams

Platform:

Android, iOS, Web, Windows Desktop, World tenant

Status:

Launched

Change type:

Links:

MC1148540

Details:

Microsoft Teams now blocks messages containing weaponizable file types, such as executables, in chats and channels, increasing protection against malware and other file-based attacks.

Change Category:
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Scope:
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Release Phase:
General Availability, Targeted Release

Created:
2025-08-14

updated:
2025-12-18

Docu to Check

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MS workload name

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summary for non-techies**

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Direct effects for Operations**

Please, look at the most relevant linked item for details

explanation for non-techies**

Microsoft Teams has introduced a new feature that enhances security by blocking certain types of files that could potentially be harmful. Think of it like a security guard at the entrance of a building who checks what people are bringing inside. Just as the guard might stop someone from bringing in dangerous items, Microsoft Teams now stops certain file types, like executable files, from being shared in chats and channels.

Executable files are like packages that can run programs on your computer. While many are safe, some can contain harmful software, similar to how a seemingly harmless package might hide something dangerous. By blocking these files, Teams aims to prevent malware and other malicious attacks that could harm your computer or network.

This feature is available across various platforms, including Android, Desktop, iOS, and Web, ensuring a consistent level of protection no matter how you access Teams. This update is part of Microsoft's ongoing efforts to make digital communication safer and more secure for everyone.