Microsoft announced that it will retire the Calendar, People, and Files Microsoft 365 companion apps on December 16 and urged admins to remove them from managed devices in their organization.

This follows Microsoft’s October 2025 announcement that it will begin automatically installing them on all Windows 11 enterprise devices with the Microsoft 365 desktop client apps by the end of December 2025.

The Microsoft 365 companion apps integrate Copilot for contextual AI assistance and can help locate people within the organization, access Microsoft 365 and locally stored files, and manage one’s schedule using the Microsoft 365 calendar from the Windows 11 taskbar.