Microsoft will fully retire its trio of Microsoft 365 companion apps—covering calendar, people, and files—on December 16, 2026, according to documentation published on the Microsoft Learn platform.
Timeline and Retirement Details
The phase-out affects three distinct utilities: the Calendar companion, the People companion, and the Files companion. Microsoft initially introduced the Files and People companion apps in March 2025, followed by the Calendar companion two months later. By October 2025, the company had integrated Copilot functionality into each application.
According to Microsoft Learn documentation, the utilities will reach end-of-life status no later than December 16, 2026, though applications may become non-functional earlier depending on tenant management settings. Removing or retiring the software does not delete underlying data or affect existing Microsoft 365 capabilities, as user information resides directly within core cloud services rather than the standalone companion interfaces.
Administrator Guidance and Removal Procedures
Tenant administrators must actively purge the companion apps from managed corporate environments. Microsoft outlines several deployment vectors that require intervention:
- Automatic Updates: Companion apps were installed automatically on eligible Windows 11 devices via Microsoft 365 Apps updates unless administrators specifically opted out. Microsoft has since halted these automatic installations.
- Enterprise Distribution: Organizations utilizing Microsoft Intune or alternative software-distribution tools must explicitly block deployment packages and strip existing installations from managed endpoints.
- Manual Uninstallation: Users operating unmanaged hardware can remove the software independently. The process requires navigating to Windows Settings, selecting Apps and Installed apps, locating the Microsoft 365 companions entry, and choosing the uninstall option. Alternatively, users can type the specific app name into the Windows Search Box, right-click the result, and select uninstall.
Microsoft advises IT administrators to distribute retirement announcements to internal users, purge internal software catalogs of installation links, and monitor removal tracking metrics until all endpoints report clean devices.
Alternative Workflows and Recommended Tools
Following the retirement of the companion interfaces, Microsoft directs users to established native applications and search platforms to handle daily productivity tasks:
- Calendar and People Information: Users should transition workflows directly to Microsoft Outlook and Microsoft Teams.
- File Discovery: Document retrieval should rely on the Windows Search Box, File Explorer, SharePoint, OneDrive, Word, Excel, PowerPoint, and related productivity suites.
- AI-Assisted Search: Microsoft Copilot remains available to locate files and calendar details even when users remember only partial search criteria.
Frequently Asked Questions
Will retiring the companion apps delete my files, meetings, or contacts?
No. All files, calendar entries, and contact details are stored natively within core Microsoft 365 services rather than the companion apps. Data remains fully intact.
Do unmanaged device users need to take action?
Yes. If an organization does not manage a user’s device, the individual must manually uninstall the applications through Windows Settings or the Windows Search Box before the software becomes non-functional.
Can tenant admins remove the apps ahead of the 2026 deadline?
Yes. Tenant administrators possess the authority to strip the companion apps from all managed devices at any point prior to the official December 16, 2026 retirement date.
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