If you find when creating an onboarding document with RTF tags that any tags aren't working, it's likely because there is added formatting in Microsoft Word that prevents them from being read correctly.
The best way to troubleshoot is to open the document in Notepad and search for the tags that are not working.
In the example below, when opened in Notepad the First Name tag included the additional highlighted text:
Expected: <#=@Model.Employee.NameFirst#>
Actual: <#=@Model.Employee.NameFirst#}{\rtlch\fcs1 \af1\afs20 \ltrch\fcs0 \f1\fs20\cf1\chshdng0\chcfpat0\chcbpat8\insrsid10496484\charrsid10496484 >
Delete the extra text in between the "#" and the ">" (the highlighted portion above) and then save. Do this for all problematic tags.