Sorry to bump an older thread, but we see to have the same issue here. Only seems to be affecting a small number of staff using desktops (>10), and we haven't made any group policy changes lately regarding fonts. In the developer console we see the following errors when loading Office 365:
CSS3111: @font-face encountered unknown error.
office365icons.woff
CSS3114: @font-face failed OpenType embedding permission check. Permission must be Installable.
office365icons.ttf
We've tried a fair bit to resolve this after researching online but cant seem to crack it... any advice? If we use Google Chrome there are no errors at all, the problem only seems to occur when we use IE (version 11).
Many thanks