I guess it's because I have enabled Insider Release Preview there
That's why, if you install the latest insider version of Onedrive on a PC with build 15063 (and have never been in insider) the option of files on demand will not appear.
Now I am completely confused - I just installed same version of onedrive on skippy and it said the skippy was a later version BUT the skippy default version does not have Files on Demand - GO FIGURE!
Computer Type: PC/Desktop OS: Windows 10 Pro, CPU: Intel i5 4690 Motherboard: Asus Z-97A Memory: 2 X 8GB Kingston HyperX Fury Black Series Graphics Card: N/A Sound Card: Outboard Audiophile DAC Monitor(s) Displays: Samsung S24D360 Screen Resolution: 1920x1080 Keyboard: Microsoft wireless Mouse: Logitech wireless PSU: Evga SuperNova 550 G2 Case: Fractal Design Define R5 Cooling: Stock Hard Drives: Too Many Browser: Google Chrome Antivirus: Windows Defender, MalwareBytes Other Info: I built this stupid computer in Feb. 2015 specifically for Windows 10
Computer Type: PC/Desktop OS: Windows 10 Pro, CPU: Intel i5 4690 Motherboard: Asus Z-97A Memory: 2 X 8GB Kingston HyperX Fury Black Series Graphics Card: N/A Sound Card: Outboard Audiophile DAC Monitor(s) Displays: Samsung S24D360 Screen Resolution: 1920x1080 Keyboard: Microsoft wireless Mouse: Logitech wireless PSU: Evga SuperNova 550 G2 Case: Fractal Design Define R5 Cooling: Stock Hard Drives: Too Many Browser: Google Chrome Antivirus: Windows Defender, MalwareBytes Other Info: I built this stupid computer in Feb. 2015 specifically for Windows 10
UPDATE 11/14: KB4052314 Update for Windows 10 Mobile Build 15254.12 Mobile - Windows 10 Forums
Source: Feedback Hub
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How to Update to Windows 10 Mobile Insider Preview Builds for Phones
Update August 29th 2017: Announcing Windows 10 Insider Preview Build 16278 for PC Insider - Windows 10 Forums
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Source: Announcing Windows 10 Insider Preview Build 16275 for PC Build 15245 for Mobile - Windows...
Update August 23rd 2017: Announcing Windows 10 Insider Preview Fast Build 16273 for PC Insider - Windows 10 Forums
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Source: Announcing Windows 10 Insider Preview Build 16257 for PC Build 15237 for Mobile - Windows...