1. On the special event, go to the Invitations tab, click on the green downward arrows next to invitation name, and click Edit.
  2. Note the name of the package.
  3. Go to Marketing and Communications > Packages.
  4. Find the package used in the invitation and click on it.
  5. Note the name of the export definition.
  6. Go to Marketing and Communications > Export definitions.
  7. Click on the export definition used in the package. 
  8. Click Edit and add the fields you need to the right hand side.
  9. Click Save.
  10. Re-run your invitation process.