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.

The good news is that the February update which brings the new Outlook doesn't strip out the old version of the app, so you can still use that.

As the push toward Windows 11 continues, Microsoft confirms that Windows 10 users will lose support for apps including Word, Excel, and Outlook.

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

So, it’s possible the free Windows 11 upgrade may stick around for a while. According to Steam, about 55% of users have already migrated to Windows 11, but 42% remain on the old

If you're still running Windows 10 and you subscribe to Microsoft 365, your Microsoft 365 apps will cease to function on Oct. 14, 2025, according to an official Microsoft blog post. This will happen when Microsoft ends Windows 10 support,

What will that mean for 365, and what about enterprises who have the option to extend Windows 10 for more than just a year — at a steep cost? Microsoft’s most recent support document adds little helpful detail.

Microsoft will end support for Microsoft 365 for Windows 10 this October, so you'll need to buy a new Windows 11 PC.