The branch subdomain is only automatic is Netlify DNS is used. If not using Netlify DNS, there is an alternate process as documented here:
Yes, deleting the Netlify DNS zone does delete the branch subdomain and, in that case, the manually process above must be used instead.
I do see the required DNS records for the manual process for
abpmm.ad.promoving.com. However, for
topmoving.com the primary custom domain is
www.topmoving.com so the branch subdomain would need to be a subdomain of
www. For that branch subdomain the name must be
abtmd.www.topmoving.com instead of
If you would change the one CNAME record to be for
abtmd.www.topmoving.com and delete the Netlify DNS zones we can manually update the SSL certificates to cover those branch subdomains.
If there are any questions or if you are ready to proceed with the manual process, please reply anytime.