What Windows 10 version are you running? Files On-Demand runs on Build 16215 only. Meanwhile, you can try it again. After installation right-click on One Drive icon at the System tray and click on Settings. Next select the small box close to Save Space and download files as you use them and Click the Turn On button.
16215 of course as I said after the activation procedure OneDrive goes offline and comes back in its previous state. May be I have to uninstall OneDrive and reinstall it
Yes, they did, but that's not enough, a PC release is missing, right? EDIT 1: BTW, I don't care about Windows Phone, my Microsoft Lumia 950 XL was abandoned, I don't care about it anymore. EDIT 2: Now using Android phone... Now using iOS phone...