Excel Xlfn
In the example shown, the UNIQUE function is used to extract unique values from a range of data. UNIQUE is only available in Excel 365, and was introduced in 2020. When the workbook is opened in an older version of Excel, the __xlfn prefix appears. Note that the original result is still displayed. However, the formula will not update to show a new result if data changes. Solution or workaround If you open the same workbook in a version of Excel that contains the missing function(s), the _xlfn prefix will be disappear and the function will calculate normally....