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I have four Microsoft Excel workbooks (excel spreadsheets). One is a list of Donors and the other three are separate campaigns which had click-throughs from an email blast. What I've been asked to do is to find out which click-throughs actually donated to that campaign.

Hope this makes sense. I'd love some help on what to it a macro or formula to tie together two workbooks, or perhaps there's a simpler solution I'm missing.

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You can simple reference another workbook with by prefixing your formula with the filename in square brackets:


and work with that.

If the files are not in the same directory, try to specify the path:


PS: That works for Excel on Windows. But I hope this works the same way for Office for Mac.

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