To insert a citation into a footnote, you need to create the footnote first, in word and then insert the endnote citation into the footnote itself. If there is a URL in the footnote template (there should be one for each reference type in your output style) and includes the URL field and the record includes a URL in that field, it should appear automatically. You mentioned before that you aren’t getting a bibliography, and the generation of a bibliography is also a setting in the output style (and needs a corresponding template for each ref type). Can you attach your output style (it will be an .ens file saved on your hard drive somewhere – not sure where on a Mac).