Does the default Export To Excel button always exports to .xls file?

Hi , Does the default "Export To Excel" button always exports to '.xls' file? As my client asks to always export to the newer ‘.xlsx’ file. Do i have make a custom microflow as explained here : or is there an easier way to impliment this?
1 answers

Why should it be an .xlsx file? It is a plain sheet with data from one datagrid.

If you need a custom file extension you'd need to use the custom excel exporter.