Dear Teresa Cadorin,
Good day!
Thank you for posting to the Microsoft Community. We are glad to assist.
First of all, we apologize for the inconvenience caused to your work. Based on your post regarding "how do i change outlook back to the old version".
please try the below:
From New Outlook for windows > Help > Go to 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.
- 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.
REF:Toggle out of the new Outlook for Windows preview
3.if the above steps didn't reterve to classic outlook you can Install classic Outlook for Windows: To install a standalone version of classic Outlook for Windows, select Download and follow the prompts to complete the installation.
REF:You can't open classic Outlook on a new Windows PC
I hope the above information will be helpful. Please feel free to let me know if you have any other concern or if I get you wrong. Glad to assist you. We sincerely appreciate your patience and cooperation. Thanks for your precious time!