Microsoft is killing off Windows 11’s Mail and Calendar apps by the end of the year

Microsoft is planning to no longer support the Windows Mail, Calendar, and People apps later this year. 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.

Existing installs of classic Outlook through perpetual and subscription licenses will continue to be supported until at least 2029, so it’s going to take some time for Microsoft to fully move all Outlook users to this new app. It’s starting with the Mail and Calendar apps in Windows later this year, followed by an opt-out phase for Outlook on Windows. You can read more about Microsoft’s timeline for the new Outlook for Windows here.