Probably. The file format used by Microsoft Office does not embed fonts. Instead, it loads fonts based on reference when the file is opened. If the font specified does not reside on your system, the closest will be substituted. To add to the challenge, it expects the fonts on you system to use exactly the same name as the fonts in the file which is often not the case. Two different applications may define the exact same font with slightly different names. When you want to ensure a great match, you need to create a font mapping.