“Microsoft 365 Apps will no longer be supported after October 14, 2025, on Windows 10 devices,” the company said. “To use Microsoft 365 Applications on your device, you will need to upgrade to Windows 11.
Updates for Office 365 would still be available until October 10, 2028."
Microsoft warns that “using an unsupported OS can cause performance and reliability issues when running Microsoft 365 Apps. More interestingly, although “if the issue occurs only with Microsoft 365 Apps on Windows 10, with or without Windows 10 Extended Security Updates, and doesn’t occur on Windows 11, support will ask the customer to move to Windows 11,” Microsoft also says “if the customer is unable to move to Windows 11, support will provide troubleshooting assistance only; technical workarounds might be limited or unavailable.”