Hello,
I have follow your [Support Guide] How to use Netlify’s branch deploy feature without Netlify DNS and created a custom domain for one of my branch deploys – not managed through netfliy’s DNS.
Branch deploy : https://dev--zallo.netlify.app/
Custom domain: http://dev.docs.zallo.io/
The domain works, but as mentioned in step #4 of your guide, your assistance is required in order to issue an SSL certificate for the custom domain.
Regards,
Hayden