Short Powershell that sets a single SharePoint Online list to a chosen look: ClassicExperience (old UI), NewExperience (modern look) or Auto Setting.


Old UI (ClassicExperience):

Modern UI (NewExperience):




In order to run the script, download, open the file and edit the 2 lines below:




Choose the experience you want to set for your lists:
NewExperience - modern UI
ClassicExperience - old UI
Set-ExperienceOptions -Username $username -Url $Url -password $AdminPassword -ExperienceOption  NewExperience



The script and several of its variations are also available on GitHub:


Don't hesitate to report issues or request new features/scenarios!