An error occurred while saving the commentCorey commented
I think this is the same thing I was going to suggest. It seems that if you click a link when someone shares a sheet that has VB or macros (something not supported in Excel Online) in Firefox or Chrome, you don't get the button option to open it in Excel application. Using windows 7, it only appears when using Internet Explorer (I have version 11 installed).
So to add on to this, my suggestion is to have the "Open in Excel" button available when using FF or Chrome.Corey supported this idea ·