Cannot Find Link To External Workbook

I have a document (unfortunately I cannot attach it) in Excel 365 that each time I open it I get the usual prompt that it is calling an external link. As much as i'd love to hide the popup I need to find the link to solve to problem but I'm at a loss.

Simply breaking the links doesn't work for some reason, so I've tried updating the source to reflect the current file. No luck there.

I've searched the workbook for the name of the link in question, searching for all formula for name itself as well as variants of "[" and ".xlms".

I don't see anything in the name manager referencing that external file.

I don't recall if I copied from that particular document, I may have as it was a duplicate file. I tried looking over the cells I believe I copied from it but didn't see the reference.

I've installed Kutools and Bill Manville (MS MVP) FindLink Tool. Both of which says there is no external link.

I've looked at the compatibility checker which basically just says, yes there is an external link but give no insight on how to address.

I've tried a couple of macros, some of which crashed excel, some of which simply said that there was an external link but not how to find it. In my frustration I forgot which one that was but I'm about to try that approach again and look for that code.

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