change col title only for some columns when export

m75sa

Hi,
i know that there are several posts on the forum about this but no result i had sorry.
I have a table with 3 columns. I would like to change only the second column title (for example) when i export via 'export button'

Any ideas?

rf1234

buttons: [
{ extend: "excel",
    customize: function( xlsx ) {
        var sheet = xlsx.xl.worksheets['sheet1.xml'];
        $('row:eq(0) c[r^="B"] t', sheet).text("newColumnName");
    }
} ]