I am trying to save a file in LibreOffice Calc that is still usable in Microsoft Office Excel. Save as
.xlms doesn't work.
Menu>File>Save As type ".xls".
Open your spreadsheet in LibreOffice Calc. Navigate to
File -> Save As.
Make sure you open the "File Type" menu:
Then either select
.xlsx depending on whether the version of Excel you are using is 2007 or newer:
Click "Save" and there you go.