Word has no native facility for that. The simplest way around it is to not use endnote cross-references. Instead, insert the entire endnote at each location.

Alternatively, you could store all the endnotes and their references in one place (e.g. at the end of the document), with only cross-references to them elsewhere in the document. Then, when the content deletion is complete, move each endnote to wherever the first cross-reference to it appears and delete any endnotes that aren't cross-referenced.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]

Unfortunately this is not possible, as the reference list is required by the client to be at the end. Plus, the list of references would take up most of the page in some cases.
I have thought of that as a possible solution. Since the process will run from a VBA userform, I have a few options available. I have created a function which will recreate the EndNote at the location of the first cross-reference, and that seems to be working well, but I haven't yet gotten the part working which will relink or recreate cross-references to the new EndNote when there are more than a single cross-reference. I have been debating switching to all cross-references, although the benefit of using EndNotes is that it should reorder and renumber automatically.

Thanks for the input.