Microsoft 365 Service Updates for September 29–October 5, 2025

Microsoft 365 Service Updates for a week in late 2025, detailing numerous changes across various Microsoft products. A primary theme is the retirement of several legacy SharePoint features, including SharePoint Add-Ins, Azure ACS, and older workflows, with deadlines set for April 2026, mandating migration to modern alternatives like the SharePoint Framework (SPFx) and Power Automate. Other significant updates focus on expanding the capabilities of Microsoft Copilot and AI features within Microsoft 365 apps, such as enabling multiple account access and new HR data connectors. Additionally, the updates cover general product evolution, including the transition of Project to Planner, the introduction of Windows 11, version 25H2, and various enhancements to Teams, Outlook, and security features through new policies and admin controls.