I have hidden all the backstage buttons as I need to implement my own (as it seems these cannot be repurposed).
However, I would like to use the image associated with the Exit button.
I referenced this in the backstage XML using imageMso="FileExit".
I get an image shown on the button, but this appears as an 'X' rather than the image on the built in FileExit (red tag with x in it).
Is there a different imageMso for this?