as I'm probably getting forced to use Excel again I am trying to get the whole thing working now within Win10 inside a Virtualbox. I already tried 32- and 64bit Version of the Office365 package. Nor does the Save-Mode make a difference. It is always the same "display-bug". If you look at the screenshot ever pop-up menu is display correctly (if you find the place where to click) but the actual spreadsheet and it's canvas is more or less grey-ish.
Ahh the other Office Parts e.g. Word, Powerpoint etc. do the same. Also Strange black-greyish canvas.
Did anybody see that already and could help me with some information?
The setting in my Display Options, don't chance it either.