If staff need to email attendees (who actually attended the event) the current download doesn't have a yes or no field like the full events report. A situation like this occurred this week and we had to manually check attendance and then delete the non attendees. Very time consuming on a big event.
This functionality was recently released and a full export of attendance is now possible. More details are available here: https://accessgroup.my.site.com/Support/s/article/Abintegro-Events-Manager-bulk-upload-attendance