I am using excel service web part to display a single named tab excel workbook (13MB) on a site page that is horridly slow when trying to display the original .xlsm file in the site page. So I did some testing on the file extension and if the file is converted to an excel binary worksheet .xlsb the file size goes down to 4MB and loads in a snap on the page.
Is there any way to fire off a workflow to convert this file from .xlsm to xlsb when a user creates io modifies the file in a library?
Thanks,
BJ