Microsoft Teams Insider Microsoft Teams Monthly Update - December 2025
Dec 19, 2025
Tom Arbuthnot dives into the exciting December 2025 updates on Microsoft Teams and Copilot. Discover the default integration of Anthropic models in Microsoft 365 and the arrival of GPT-5.2 with new selector features. Get insights on the upcoming Microsoft Planner updates and the automatic voice enrollment for improved meeting experiences. Highlights include compliance call recording innovations and the latest device news, featuring Jabra's new smart dock. Plus, learn about the roadmap for Teams enhancements in the near future!
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Anthropic Models Enabled By Default
- Microsoft has moved Anthropic models into Microsoft AI Foundry and added Anthropic as a data subprocessor by default for most tenants.
- Tenants must opt out by Jan 7 if they do not want Anthropic processing their Microsoft 365 Copilot data.
Copilot Now Supports GPT‑5.2 And Behavior Modes
- OpenAI progressed rapidly to ChatGPT 5.2 and Microsoft already exposes 5.2 inside Microsoft 365 Copilot.
- Copilot now offers behavior-based selectors like instant or thinking and explicit 5.2 options for different response styles.
Switch To The Business Copilot SKU
- If you use Microsoft 365 Business or Business Premium, switch to the new Copilot business SKU to save on license costs.
- The business SKU duplicates Copilot experience but lists at a lower price and may be eligible for a 15% promotion.