All characters from Webdings and Wingdings 1–3 have canonical mappings to Unicode, see e.g. Alan Wood's Unicode resources or Unicode document L2/12-368 = ISO/IEC WG2 N4384. Some of them are also emojis now, some of which need VS-16 U+FE0F attatched to be displayed with colors (or VS-15 U+FE0E to stay monochrome). Even if most of these are rarely send by Outlook users, I think it still makes sense to supply all of these mappings by default.
All characters from Webdings and Wingdings 1–3 have canonical mappings to Unicode, see e.g. Alan Wood's Unicode resources or Unicode document L2/12-368 = ISO/IEC WG2 N4384. Some of them are also emojis now, some of which need VS-16 U+FE0F attatched to be displayed with colors (or VS-15 U+FE0E to stay monochrome). Even if most of these are rarely send by Outlook users, I think it still makes sense to supply all of these mappings by default.