It is possible to send your e-ticket to all registrees of your event, whenever you want. You can find the button 'Resend e-ticket' in the Registration Module at 'Registered'.
Just (re)send the registration confirmation to all who registered, or to a specific target group. You can filter on list, entry ticket or workshop.
Adjust the registration confirmation text if needed (in the Mail Module)
Check whether the e-ticket is activated
Go to the Registration Module
Filter on 'Registered'
Choose the option 'Send e-ticket'
Use the filter to choose the appropriate target group
Send the registration confirmation
Please note: the text in the registration confirmation will be automatically send to all future registrations.
If you want to avoid this, you can temporarily pause registrations, until the e-tickets are sent. Don't forget to activate it, after putting the original text back in place.
Please note: if you are using extra guest registration, remember to also adjust the extra guest confirmation mail.