Windows 11's built-in Mail and Calendar apps will no longer be supported by the end of 2024.Users can still access emails and calendar events in view-only mode in the Mail and Calendar apps.Users will need to switch to the web-based Outlook app to send or receive emails.Microsoft aims to unify email and calendar management in Outlook.The Mail and Calendar apps will be accessible via a 'view-only' mode.The 'view-only' mode currently doesn't work offline, but Microsoft is working on adding support for this in the next few weeks.Users have the option to downgrade their Mail and Calendar apps to previous versions but this loophole will stop working on December 31, 2024.Some users have expressed concerns about the web-based Outlook app's lack of offline access and inconsistency with Windows 11 design.Users can export data from the Mail and Calendar apps to third-party apps or Outlook.Microsoft's decision to phase out the Mail and Calendar apps may not be well-received if the replacement Outlook web app lacks features and polish.