Causes
- By default, Cloudflare prohibits a DNS CNAME record between domains in different Cloudflare accounts. CNAME records are permitted within a domain (www.example.com CNAME to api.example.com) and across zones within the same user account (www.example.com CNAME to www.example.net).
Fixes
Step 1
To allow CNAME record resolution, the domain owner of the CNAME target must contact Cloudflare Support and specify the domains allowed to CNAME to their target domain. A Cloudflare Pro, Business, or Enterprise plan is required on the target domain for Cloudflare Support to change default CNAME restrictions.