Installing Multi User Mode non SE enviroment

Hi,

One side of our business has 15 supermarket sites , each site only having 3 windows 7/10 machines. Any external employees who need to log into that site to work use remote desktop as it is supported for upto two concurrant users. The problems TeamViewer faces with this is that it mirrors the current active display on non multi user mode installs so if i teamviewer into that machine and another user is currently remote desktop connected in i will see that screen instead of the screen the user who is in front of the actual machine.

Being able to install multi user mode on non server editions of windows would fix this but there isnt any command line parameters for this as far i could see in the documentation?