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Microsoft to retire Microsoft 365 Companion apps in December

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Microsoft to retire Microsoft 365 Companion apps in December

Microsoft will retire the Calendar, People, and Files companion apps for Microsoft 365 on December 16, 2026. Administrators have been directed to remove these applications from managed devices before the cutoff date.

Why it matters: Organizations managing Microsoft 365 deployments must plan app removal and communicate the retirement to users to avoid disruption and ensure continued compliance with Microsoft's support lifecycle.

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