After a survey has launched, it is possible to add more people to that survey.
- Ensure that the people that require invites are listed on the Participants page, you will need to add them as a user if they haven't already been loaded
- On the Participants page, select the people that you want to send additional invites to, the "invite pending" status should appear next to their name
- Click on the Confirm New Participants button to send the additional invites
People can only be added to a survey as participants if they are active users. People who are Observers, or have a future Start Date cannot be made participants.