After registering for your event, your guests will immediately receive a confirmation email. That said, if you want to re-send the confirmation emails to your guests, you can do so from the Dashboard > Overview.
Re-Sending Confirmation Emails In Bulk
Tick the boxes next to the names of the guests you want to re-send the confirmation email to and then click the 'Actions' button. Select 'Confirmation' and then confirm your intent to re-send the confirmation email.
Manually Re-Sending Confirmation Emails To Individual Submissions
In the expanded view of a submission, locate and click on the three dots in the upper left corner and then select 'Confirmation'. Confirm your intent to re-send the confirmation email.