Hello,
This is a part of my Post Experience and suggestions with creating a brochure - #2 by Nikolas where I collected my experiences with Only Office. I was bidden to split my suggestions in single pieces. So here you go:
Hindrances:
9. One cannot see, when a font of an imported file is not installed in the system. The font name is displayed the same as installed fonts. A hint to the missing font (italic font name, star in front of the name, red font name or similar) would be nice.