Microsoft 365 Service Updates for January 19 - 25, 2026

Service updates and system retirements scheduled for the Microsoft 365 ecosystem throughout early 2026. These changes include a critical out-of-band security fix for cloud storage issues and the transition toward modern authentication protocols like OpenID Connect. Several legacy features, such as SharePoint's featured links and specific Microsoft Defender profile support, are being phased out to prioritize enterprise security. The updates also highlight the expansion of AI-driven capabilities through Copilot agents and improved administrative controls across Teams and Viva. Organizations are encouraged to migrate to Graph APIs and updated security frameworks before various legacy services reach their final end-of-life dates. Information regarding upcoming technical community events and minor interface enhancements in Edge and Outlook rounds out the summary.

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