Every time we switch users in Windows 10, all non-maximized windows get resized and moved towards the top left corner. We use only one 32" display (3840x2160), and scaling is set to 100% on both accounts.
Looks like the default is not as high a resolution as that. As you seem to be aware of a similar symptom happening in a multi-monitor scenario where the resolution for each monitor is not the same, I think
that having it switch to a lower resolution could have the same effect of switching from one monitor to another. FWIW I see the same symptom with my case where I have my Surface tablet in Portrait orientation and a second widescreen monitor attached in Landscape
mode. When switching users everything ends up on the Portrait side and needs to be switched back to the other monitor. For non-maximized windows about the best we can do then is use the new Snap window method of resizing and repositioning a window to a particular
quadrant (Win+Cursor key). Otherwise, you would need to use some kind of automation tool to provide a more specific arrangement of your windows.
An alternative that I have not had as much experience with would be trying to preserve everything in a hidden Desktop and then doing the switch user from a new Desktop. Win+Ctrl+d. Does that work?
Actually both of these scenarios are ones I haven't tested since I got 1803, so I should probably try this myself too. It's been so long since I tried using multiple Desktops that I have forgotten the keyboard shortcuts involved... of course Win+Ctrl+CursorRight
and Win+Ctrl+CursorLeft
And now I realize that this hasn't been a problem for me for a long time anyway. It could be because I use the attached monitor as primary. Or it could be a reflection of the fact that there may actually
have been some improvements made for this scenario and not appreciated as such. Then my next try at emulating what I am recollecting would be to only have an MWDA connection as my secondary screen. I am sure that that would cause the symptom that I was referring
to above. E.g. the second user would probably have to attach the MWDA itself (from a Portrait oriented PC Screen Only session) ; then when the first user resumed
it would have to attach the MWDA again, probably switch the Display configuration to Extend or Second Screen Only (e.g. via Win+P) and finally fix the layout of the active windows (because of the temporary forced Portrait only orientation). Then, again, I
would like to know if a hidden Desktop could do anything about preserving the original sizes and positions for the windows which were originally placed on the widescreen monitor. It would be nice if it did but I don't think we should expect that it would.
I may test that yet. TBD.
FYI
Robert Aldwinckle