What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Thank you for providing us with more details.
The user guide -How-to-use-Custom-Domains-with-Jotform was referring to the CPanel option in your website.
To use your own domains in Jotform, add a DNS record:
Add a CNAME record which points to custom.jotform2.com with your subdomain. Here is what it will look like in the DNS:
forms.my-company-domain.com CNAME custom.jotform2.com
so, you need to add first a CNAME record which you will use later as the URL
The URL you are pointing on your screenshot is NOT the custom domain URL.. that is the custom URL Name of the form (if you want to use custom URL Name)
Hope this is clearer. Please dont hesitate to let us know if further assistance is needed.
Victor M Larrea