Solved Outlook 2016 Disproportionate Window Panes Part 2

I am once again having this issue whereas the sidepanels and the ribbon within the desktop side of Outlook 2016 are out of proportions again (basically enlarged). I'm mostly going to reference the old thread I marked solved since it's the same issue, although this time it's a different user and the solution there of reimaging the machine did not permanently work here for some reason. Initially it worked, but on a restart the problem returned (and this happened after two tries at reimaging).

https://forums.techguy.org/threads/outlook-2016-disproportionate-window-panes.1215030/

DPI settings are normal (100% scaling), and resolution does not appear to factor in its appearance. This is only the second user I've seen this with though so judging from searches it doesn't appear to be a widespread bug with a Windows update at all.

Has anyone seen this before and know of a fix? Outlook does let you format email panes and columns and the like but not the actual left panel, right panel (if it's enabled), and the ribbon pane.

 

Good idea, I haven't messed with that. Unfortunately though, that doesn't seem to be it. In the previous thread the ribbon pane was enlarged to the point where it wouldn't show the whole thing. Same case here, and it's not something that's customizable like the folder pane line is.

It's like a permanent DPI setting is applying to the window panes itself. It can be made wide enough to fit the ribbon pane in but it's moreso than normal.

 

Flatscreens, relatively new ones at that (HDMI compat at least).

I'm marking this as solved as, once again, I found a roundabout way around it. Setting the custom scaling to 101% seems to have fixed it. Another strange oddity I suppose.