Product updates
You can now control who can submit external forms and when they close.
Use this to:

Under the External form settings you'll find a new Access & Scheduling section with four options:
Close date -> Set a specific date and time when the form stops accepting submissions
One submission per traveller -> Prevent duplicate submissions by restricting to one per email address
Total response limit -> Cap the total number of submissions allowed
Custom closed message -> Write a message travellers will see once the form is no longer accepting responses