If your attendees are already approved and you want to send their login details to them again, log in to the event Admin area and follow the directions below:
1. On the Attendees page, select 'All' in the page-size dropdown at the right
2. Check the box at the top left of the attendee list to select all on the page
3. Scroll to the end and select 'Send login and approval email' in the Actions dropdown, then click 'go'
A green notification banner will appear when the emails have been sent.