sites.mysaasdomain.com. For each client domain (a mix of root and subdomains), I’ve added the required "DCV Delegation for Custom Hostnames" CNAME entry, for example:_acme-challenge.test.example.com → test.example.com.XXXXXXXXXXX.dcv.cloudflare.com_acme-challenge.domain.com → domain.com.XXXXXXXXXXX.dcv.cloudflare.com_cf-custom-hostname TXT record on each domain as part of the setup._acme-challenge TXT record alongside the CNAME, so in some cases I have both:_acme-challenge.domain.com (CNAME)_acme-challenge.domain.com (TXT)