If you use the Microsoft Windows 11 operating system on your computer, you must be aware that the technology company has already started "forcing" users to use the new Outlook application, replacing the Mail and Calendar applications on the operating system.
For now, Mail and Calendar can still be used on the operating system, but now, the operating system seems to start forcing you to replace the use of these two applications with the (new) Outlook.
In summary, if you are using the updated Windows 11 operating system now, when you open the Mail or Calendar application, the application will open, but at the same time, the Outlook software will also open, and it will open Outlook (new) by force above the old software.
For now, the option to use Mail and Calendar can be changed through Settings > General > About Outlook, but now it seems that the option will be forgotten every time you need to open the Mail or Calendar application.
These two software are expected to be removed directly by Microsoft in an update at the end of this year, and this is seen as a way for them to force users to get used to new applications.