Switch from 'new' Outlook (2023) to 'classic' outlook

Anonymous
2023-04-18T20:26:13+00:00

I need to go back to the Classic version because the 'new' Outlook lacks some features that I need for work.

This webpage https://support.microsoft.com/en-us/office/getting-started-with-the-new-outlook-for-windows-656bb8d9-5a60-49b2-a98b-ba7822bc7627 states "You can switch back whenever you want, just switch the toggle off in the new Outlook and it will automatically open the classic version."

There is no toggle. Is there any other way I can undo this update and go back to the previous version?

EDIT: Moved FROM Microsoft 365 Insider / Outlook / Windows TO Outlook / Outlook for Windows / For business.

Outlook | Windows | Classic Outlook for Windows | For home

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Anonymous
2023-04-19T15:15:49+00:00

Once flipped on, the toggle is irrelevant since the "old" version still exists. Just run it. 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

The nice thing about the New Outlook is that it's not an either/or proposition (like New Teams is). You have both old and new. You can even run them concurrently.

But if running that actually runs New Outlook for you (some have reported that's the case), then either:

  1. Uninstall Outlook

or

  1. run Regedit.exe and go here (or the same with 15.0, if you don't have 16.0):

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\Preferences

And in that you will see UseNewOutlook

Set it to 0, which means that running old Outlook actually runs it.

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  1. Anonymous
    2023-04-21T14:42:16+00:00

    The only problem is, when I open the old app, the new version opens instead.

    That's interesting, but do you mean when you're clicking on outlook.exe directly or a shortcut?

    FYI, new Outlook is olk.exe.

    If it's really the case that outlook.exe launches olk.exe, that's something that I've never seen.

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  2. Anonymous
    2023-04-21T12:56:17+00:00

    Take a look at my last post. You don't need the toggle now. Old Outlook is still there.

    The purpose of the toggle is to install New Outlook. Once that's done (and it's not even really needed for that, since it can be installed manually), its work is done.

    The only problem is, when I open the old app, the new version opens instead.

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  3. Anonymous
    2023-04-20T20:38:28+00:00

    Thanks for the additional information, TSW_51.

    Since you're using Microsoft 365 Apps for Enterprise, I will have to transfer this thread of yours to the commercial side for the forums. They have the expertise to help you with this particular product.

    So, please wait for anther moderator to take over from me.

    Thanks again for choosing Microsoft! We’re here when you need us.

    Respectfully,

    Glenn Rue

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  4. Anonymous
    2023-04-20T14:45:29+00:00

    Take a look at my last post. You don't need the toggle now. Old Outlook is still there.

    The purpose of the toggle is to install New Outlook. Once that's done (and it's not even really needed for that, since it can be installed manually), its work is done.

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    3 people found this answer helpful.
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