Increase the 4MB InfoPath file attachment limit for Office 365 SharePoint Online
Currently the attachment limit for an InfoPath form is set at 4MB by design, it is hardcoded by MS and can't be customized (Office 365 SharePoint Online). We recently opened the case with Microsoft but they say we can not change it.
Please allow the attachment size limitation to be customized as it is on SharePoint On Premise environment.
+1 I need to use bigger files in a form...
Jerry Cote commented
If even you could provide client-side code we could use in an InfoPath form. We know how to code it server-side to place attachments into a separate library, but that doesn't work for SP Online.