Users of doomed operating system to receive unloved app via an update Microsoft's new Outlook will be automatically installed on Windows 10 machines as part of an upcoming monthly security release.… According to a message in the Microsoft 365 message center,

New Outlook serves ads in the email client, which are impossible to remove without paying. Lack of a unified inbox makes it challenging to manage multiple email accounts in New Outlook. The interface of New Outlook is clunky and reminiscent of Windows 8, leading to an overall unpleasant user experience.

The new Outlook app will be packaged in an optional download for Windows 10 starting January 28th, but after the February 11th security update, it will be be a forced inclusion. T

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

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.