I don't know the exact reason why fonts aren't shared across virtual drives (thru symlinks or else) but actually copied, so what you tried doesn't work. More precisely, the fonts you put there will only be available from virtual drives after POL_Wine_InstallFonts or POL_Call POL_Install_corefonts has been used inside them, manually or from the install script.
So, if you really want to complete the procedure you started, click on the Configure button, select the Office virtual drive, then in the Install packages tab install again the corefonts package.
From what I've read, another way would have been to put them in one of the places Wine searches for fonts: - /usr/share/fonts - /usr/share/wine/fonts - ~/.fonts and have them automatically available from all virtual drives (and maybe then some, since some of those directories are also used by your whole environment) with no copying. If you experience a bit with this other way, feel free to report ;)