On existing devices, users can switch to the new Outlook for Windows from a toggle in the Mail and Calendar applications.

Microsoft is planning to no longer support the Windows Mail, Calendar, and People apps later this year. The Verge: The software giant has been moving existing users of these apps over to the new Outlook for Windows app in recent months, and now it has set an end of support date for the Mail, Calendar, and People apps of December 31st. Once the apps reach end of support later this year, Microsoft warns that users who haven't moved to the new Outlook app "will no longer be able to send and receive email using Windows Mail and Calendar." Microsoft has been rolling out the new Outlook for Windows app for years, with it officially reaching the general availability stage in August. The new web-based Outlook is designed to eventually replace the full desktop version of Outlook too, and Microsoft plans to provide enterprise customers a 12-month notice before it starts to move people away from the desktop version of Outlook.

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