This option will only allow active team members of your NeetoForm's workspace to view and submit the form.
How to enable this option
Open the form and click on the Settings tab.
Click on Access control in the left sidebar.
Select Only the logged in users of this organization can submit the form.
Click Save changes.
Publish the form so the new setting takes effect.
To grant access to a new respondent, add them as a team member from the workspace's Team members screen.
To explore the other access control options, see Managing access to a form.