A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Okay. I figured out a work-around by importing into Google Sheets and then exporting to CSV. Probably not what you wanted to hear on a MS site, but it's what we have to do in order to stay productive! (I'd recommend fixing this for Excel Online, it's kind of embarrassing for MS that its users have to use a competitor's product to make their software work. - Just a thought.)
Thanks!