Error 1014: CNAME Cross-User Banned
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 ).
Additionally, an error 1014 can be returned when a Cloudflare Apps is used on a client domain which origin is a provider using our SSL for SaaS solution. Unfortunately, this set up is not yet supported.
To allow CNAME record resolution to a domain in a different Cloudflare account, 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.