My outlook is stuck on the new version. How to go back to classic version?

Use New Outlook is not present in the registry

Fred Theobald, it doesn't matter. Forget what that Microsoft Engineer said. I don't have it either, though I do have a "Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\NewOutlook" registry entry. But don't worry about that. Just do what Hal says and install Classic Outlook instead.

Then just make sure you're clicking on the right Outlook icon - for the Classic program, not the New program (which is actually not a newer version of the Classic program, it's a completely different program.)

Use New Outlook is not present in the registry

I am very happy as it is. To me satisfactory, give me chance to block the one I don't want.

Nurettin Çarkçı

@d0301, you say "I don't want to mess up my outlook" but the fact is, you aren't using Outlook, at least not the one you knew and loved and were used to. As several Microsoft staff people have said, what they mistakenly chose to call "new Outlook" is not a more recent version of the Outlook you've been using. It's a completely new, dumbed down email program for what they think will be used by people too dumb to use a regular email program. None of us understands why Microsoft did this naming fiasco. So you will not be messing up your "Outlook", you will be installing the same version of Outlook that you have grown used to, and using that instead of the other crippled, badly-named email program that you have now. So what you want to do is exactly what Hal said to do. Don't worry. I did it and it fixed the situation and you will not have to use that dumb email program that they forced upon you any longer. Just do it, there's no excuse not to and you will be happier in the end.

The toggle to return to Classic is under the Helpmenu now:

If you don't have Outlook Classic, you can get it here:

You can't open classic Outlook on a new Windows PC - Microsoft Support