How do I embed an Endnote inside a Footnote in MS Word?

I am working on a document that for really stupid reasons must be completed in Word. This document has many endnotes, and some footnotes. In some cases the footnote text has an endnote text. However, when I attempt to insert an endnote in a footnote, Word won’t let me. What setting must I change to enable endnotes embedded in footnotes.

You need to use a style with footnote choices.  Please attach the output style are you using, and we can go from there.