The apps will still work after Oct. 14, but users should be prepared for 'performance and reliability issues over time,' Microsoft says.

“Microsoft 365 Apps will no longer be supported after October 14, 2025, on Windows 10 devices,” the company confirmed. “To use Microsoft 365 Applications on your device, you will need to upgrade to Windows 11.”

While support will end for Office apps on Windows 10 in October, it doesn’t mean the apps will suddenly stop working. Microsoft notes in a support document that was updated in D

Designed to replace the current Mail and Calendar apps, the new Outlook can only be removed after it's been installed.

Microsoft announced last year that it would be retiring the Windows Mail & Calendar apps in favor of the new Outlook at the end of 2024. As of January 1, these apps are no longer functional and will refuse to send or receive any more emails.

Microsoft will automatically install its new Outlook client on Windows 10 PCs with next month’s Patch Tuesday update.

For several months now, Microsoft has been urging Windows users to switch over to the new Outlook app, with classic Outlook recently getting an official “death date”. Many aren’t happy about this, holding off on jumping ship as long as they can — but the clock is ticking down.