As Chappo answered, it's not a question for ELU: it's not about English. But as asked, it's not for Writers either: it's a question about how to get MS Word to behave sensibly.
Writers' questions about formatting of footnotes refer to how to format the citation itself (in MLA format, for example). Questions about how to get MS Word to behave sensibly are off-topic there too.
The question is more on-topic on Superuser.
You have said you've found it useful, but that's not a reason to re-open a question if it's off-topic. It is a reason to migrate it. However, there is already a question about this on SU, so it's likely to be closed as a duplicate.
While migration will leave a stub here, even if one or other of the SU questions is closed as a duplicate, I don't think there's any real harm in leaving it here as a closed off-topic question.
[Note other moderators may disagree and can move it unilaterally. While doing that may be right, I'm finding I'm becoming more pragmatic/phlegmatic as I grow old.]