Windows 10: How to switch back to the old calendar app

I have a window 11 and the Calendar app recently asked me to try the new Outlook app. I clicked on it and now I can't go back to the old build-in Mail & Calendar apps. I've heard that there's supposed to be a toggle that I could switch on and off, but I couldn't find it anywhere.

:)

 

Mail app will not open on 10041.

Hello Adam,

This is the suggested solution below if you haven't already tried it.

In this Windows 10 build 10041, the Mail, Calendar, and People apps may be broken due to a licensing issue with the Store Beta. To get these apps working again, you need to follow these steps:

• Open powershell as administrator
• Run the command Get-appxprovisionedpackage –online | where-object {$_.packagename –like “*windowscommunicationsapps*”} | remove-appxprovisionedpackage –online
• Re-install Mail, People and Calendar from the Store (green tile)

 

Mail & Calendar app on Windows 10

If there are no error messages, check on the article below, and follow the suggested troubleshooting steps to resolve the issue:

• Resolve sync issues in Mail and Calendar apps in Windows 10

Let us know if the issue persists.

 

Windows 10 Calendar app sees old deleted calendars

Hi

I have a problem with the Windows 10 desktop calendar app. On the list of available calendars I see old calendars that I've deleted long ago from the web calendar app. The old calendars show up on every machine that I log into using my Microsoft account.
How can I remove them permanentny so they don't show up in the desktop app (I don't see them in the web calendar)?