https://www.theregister.co.uk/2017/12/01/citrix_receiver_for_windows_10_s/

Citrix has released a version of its Receiver app for Windows 10 S, and in so doing made Microsoft's lightweight cut of Windows for schools a bit more interesting.

Microsoft offered the world Windows 10 S in May 2017 and recommended it to schools on the basis that it can only install apps from the Windows Store. That plan was advanced as likely to keep kids from messing things up with dodgy-ware sourced from who knows where.