How to get OneDrive Files On-Demand in the Windows 10 Fall Creators Update

[Windows Central]

Is your OneDrive Files On-Demand feature missing after you installed the Windows 10 Fall Creators Update? Here's what you need to do to get it back.
Starting with the Windows 10 Fall Creators Update, OneDrive gets a new feature called "Files On-Demand," which lets you access your entire catalog of files stored in the cloud with File Explorer without having to download them and use local storage on your device.
In other words, OneDrive Files On-Demand is very similar to what placeholders used to be and Microsoft later deprecated, but that feature now works more intelligently.
Unfortunately, after upgrading to the new version of Windows 10, some users have been reporting that the feature is nowhere to be found. Although this may seem like a problem, it appears that Microsoft is rolling out Files On-Demand slowly and not everyone will it immediately.

Full story from the WindowsCentral blog...