Microsoft Teams to bring major security update in 2026: Know what’s changing

Microsoft will be using weaponisable file-type protection, as it will block the frequently used file types that spread malware.

Microsoft is expected to introduce a prominent security update for Microsoft Teams on January 12, 2026. This will be a part of the company’s action to increase online safety in workplaces. As per this change, some safety features will be automatically turned on for the accounts under ‘Teams’ which are still using some standard settings. The update aims to promote protection across Teams worldwide.

When and how will the Teams security update be executed?

The new security update of Microsoft Teams is expected to be implemented on January 12, 2026. After January 12, a major feature for messaging will automatically get enabled for Microsoft Teams. This will be done using the standard configurations.

Changes to Microsoft Teams security

Microsoft will be using weaponisable file-type protection, as it will block the frequently used file types that spread malware. In addition, it will also look for the links that are shared in the chats and will flag the potentially threatening links in real time. It will also let the users report incorrect blocks so that security systems can improve over time.

What should organisations do before the update?

The IT teams and administrators must review their current security of Microsoft Teams. This will ensure that the new updates are fitting their demands and needs. However, if a company has done customisations to the messaging safety settings, the configurations will continue to get prioritised over the new defaults.