Hi @Francis
You can switch back whenever you want, just switch the toggle off in the new Outlook and it will automatically open the classic version. More information, see:
Getting started with the new Outlook for Windows - Microsoft Support.
You should still be able to find its shortcut in Start (and wherever else you might have had it before), but if not you will see outlook.exe in one of these places (may vary slightly depending on edition), so if necessary, make a new shortcut:
C:\Program Files\Microsoft Office\root\Office16
or here:
C:\Program Files (x86)\Microsoft Office\root\Office16
New Outlook for MAC:
At any time, you can switch back by launching Outlook, then click on the Help menu and select Revert to Legacy Outlook.
Hope this helps!
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