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

The new Outlook will be installed automatically on Windows 10 in an upcoming update. You cannot block the app from being put on your PC, though you can remove it after installation.

Microsoft will start automatically installing its new Outlook email app on Windows 10 devices. It's already pre-installed on most Windows 11 PCs and rolled out to some existing Windows 11 systems.

Come Patch Tuesday in February 2025, Microsoft will be tightening down even further. According to BetaNews, February will usher in a new phase in Outlook’s migration where Windows 10 users will be forced to install the new Outlook app on their PCs.

Microsoft will force install the new Outlook email client on Windows 10 systems starting with next month's security update.

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

Starting next month, Microsoft will begin forcibly installing its new Outlook email client on all Windows 10 devices. This move will occur in two phases. The first phase of the rollout will begin on 28 th January 2025 with the release of an optional Windows 10 update. This update will include the new Outlook for users who choose to install it.

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.

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.