Here are all the new features Microsoft added to Teams in December 2025

2025 is almost at a close in many regions around the world, and as we wrap up December, it is time yet again to recap all the new capabilities that Microsoft introduced in its popular online communication and collaboration platform, Teams, in the past four weeks. This time around, the change log is slightly smaller, which is expected given that it's the holiday season.

Starting with enhancements to chat and collaboration, many Teams users will be pleased to know that they can now pop out certain core components like chats, calls, calendar, and more in separate windows by right-clicking on their icons. Additionally, Microsoft is giving team owners more control over who can join a private team using a code by requiring owner approval regardless of the presence of a code. This improves the overall security posture of this particular feature.

Microsoft has also made several improvements to the Interpreter and multilingual meeting experience, where the spoken language in meetings is now automatically detected and propagated across live captions and transcription services. As the Interpreter initializes, it will also show a "preparing" status as a visual indicator before people start speaking.

In addition, the following devices are now Teams-certified:

• EPOS IMPACT 500 MS UC ANC WL USB-C+A Headset
• EPOS IMPACT 400 ANC Headset
• Lenovo Webcams: FHD, QHD and 4K Pro
• Lenovo Dual-mode Wireless ANC Headset 6550 (USB-A and USB-C)
• The Yealink MVC S90
• The Yealink S50
• The Yealink MVC S40

There were some new features introduced for Teams Phone, frontline worker solutions, and Teams fundamentals and security, too. These include the general availability of Microsoft 365 Copilot chat in the Calls app post-calling experience, Compliance Recording ISV Support for Call Queues in Microsoft Teams Phone, Own Domain Impersonation Detection in messages, and the availability of the Frontline Hub in the Teams Admin Center. You can read more about them here.

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Posted Thursday 1 January 2026 at 3:26 pm AEST (my time).

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