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

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

Microsoft 365 apps will only be available to use on Windows 11, as the company is ditching Windows 10 support for them.

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.

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.