How to switch back to old Outlook Classic from new Outlook

Today the New Outlook version was again made the default. There is a button to switch back to Outlook Classic, when the new Outlook one still launches.

The issue can be resolved by modifying registry entry of UseNewOutlook from 1 to 0 for switching back to Outlook Classic.

Go to registry – Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Preferences