Hi.
I'm building a number of custom lists where I'm giving users the opportunity to register their interest in a volunteering opportunity.
What I'm looking to do is once the user fills out their details and submits the form it prevents any other users from submitting their details for the same list/form.
So.
User 1 - fills out form and submits.
User 2 - Can still see the form and the details but cannot submit the form.
Is there any rule that can do this?
Thanks in advance.