We are having the same issue with 64-bit Office, 32-bit InfoPath, and SharePoint Online. As meissen alluded to, with 32-bit Office and 32-bit InfoPath, we get the gray InfoPath email notification and you click Send and it goes through Outlook. However with 64-bit Office and 32-bit InfoPath, we get a Outlook draft email which you need to click Send. We do not have the option of downgrading Office, but we do have the option of installing 64-bit InfoPath to match the bit versions. If that will resolve the issue. Do you have the link to the patch? Thank you, WHEELS.