Cannot return to "Old" Outlook

Question

Cannot open earlier Outlook. Only get this screen:

*"Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. Errors have been detected in the file: C:\Users\JamesFlinn\AppData\Local\Microsoft\Outlook\ *****@comcast.net.ost"

How can I correct and return to earlier version?

Answer 1

Hello Jim,

Thank you for reaching out to the Microsoft Community. My name is Taiwo and I'm happy to help.

Do mean you want to switch back from the new outlook to the classic outlook?

To switch back to the classic view in Outlook, follow these steps: Open Outlook. Navigate to the Outlook menu. Uncheck the option for the New Outlook. Click the Revert button. Allow the application to revert to the Outlook Classic view.

https://support.microsoft.com/en-us/office/toggling-out-of-the-new-outlook-for-windows-preview-ec102b39-5727-418e-ae1f-a1805434640c

If you don't see a toggle in the new Outlook for Windows, troubleshoot with these steps: Launch classic Outlook for Windows from the Windows Start Menu, not the new Outlook (identified by the "New" tag). Open the Registry Editor by typing "Registry Editor" in the Start Menu search and selecting the app. Go to Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Preferences. Find and double-click on "UseNewOutlook" at the bottom of the list. Set the Value Data field to 0. Attempt to launch classic Outlook for Windows from the Windows Start Menu.

https://answers.microsoft.com/en-us/outlook_com/forum/all/switch-from-new-outlook-2023-to-classic-outlook/0a2a8f02-7088-49e2-97d8-7642486be5c4

I hope this helps.

Regards

Taiwo