Copilot in the Teams Chat list will be removed
Microsoft is removing Copilot from the top of the Teams Chat list. The Copilot app in Teams will soon be the new single entry point for Copilot Chat.
Microsoft 365
Microsoft 365 Developer subscriptions now enforce a 10 GB OneDrive quota
Users with an existing Microsoft 365 Developer subscription are now limited to 10 GB OneDrive storage. This already happened briefly in July, and further tenant reductions may follow.
“Ask Copilot” in Teams brings Copilot help directly to messages
Copilot Premium users can now use Ask Copilot in Teams messages, which opens the Copilot pane with the selected message content already included.
Classic Outlook style in Outlook on the web and the new Outlook
Outlook on the web and the new Outlook for Windows get an optional “Classic Outlook” style. The Classic Outlook style should give users a more familiar look and feel during the transition.
Retirement of the Microsoft 365 Companion Apps
Microsoft is retiring the Microsoft 365 companion apps Calendar, People, and Files. The apps will stop working in December 2026. Admins should uninstall them from managed devices and stop deploying them.
How to change the PrincipalOwner of a user-owned SharePoint Embedded container
A SharePoint Embedded administrator can now update the PrincipalOwner of user-owned containers. Changing the PrincipalOwner transfers full ownership and prevents the container from being deleted by the previous owner’s account.
New Microsoft 365 data location setting for in-country data storage
Microsoft has added a new setting that lets organizations in France, Germany, Norway, Sweden, and Switzerland choose whether to store their Microsoft 365 data in-country or within the EU Data Boundary. The setting is off by default. If not updated, Microsoft may store customer data regionally within the EU Data Boundary rather than only in-country.
Retirement of Similarity Checker in Word
Microsoft is retiring the Similarity Checker in Word starting October 2027, removing it from the Microsoft Editor experience. Copilot in Word should not be treated as a replacement for the similarity capability.
New Planner Usage Report in the Microsoft 365 Admin Center
Microsoft has published a new Planner usage report in the Microsoft 365 admin center, giving administrators visibility into total unique users, daily active user trends, and per-user activity details across Planner Basic and Planner Premium plans.
Calendar synchronization between Microsoft Teams and Google Workspace will be retired
Microsoft is retiring the Teams-Google Workspace calendar synchronization in October 2026. If users have calendars synced across both products, this connection will stop working, and previously matched calendars will no longer update automatically.