How Do I Grant Sub-Account User Access?

He gets a sign-in link but no way to create a password?

Hi,

I believe he needs to create an account using the same email where you shared the form. Here's a guide to know more about the details of it: http://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User.

Do let us know if you need more information on this.

Thank you.