1. Go to the extended task bar and right click on the OneDrive cloud icon.
3. Click on Account option.
This will stop syncing from SharePoint to OneDrive and stop from OneDrive to SharePoint.
5. The SharePoint you are un-syncing will disappear from the list in OneDrive but will still remain in File Explorer but won’t be syncing to the live SharePoint site.
You can then resync the SharePoint site you wish to resync from the SharePoint site directly.