_xlfn.IFS PROBLEM - Microsoft Community
Jan 31, 2018 · So if you open the Excel file in a previous version (including standalone Excel 2016), Excel replaces the function name with _xlfn.IFS. That means Excel recognizes that it is an Excel function, but not a function that is supported by the current version of Excel. As for IFS per se, it is simply shorthand for nesting IF expressions.
DA: 66 PA: 35 MOZ Rank: 73