We have a DNS Zone in Azure DNS. It is ci.mycompany.com. NS records in our primary (ISP managed) DNS are pointing to it.
Now I want to add a subdomain called web.ci.mycompany.com. I have tried to create it directly in Front Door but also so that I created the subdomain in Dns (with CNAME record). I always get the error Failed to create the custom domain
Failed to create the custom domain 'web-test-mycompany-com'. Error: Domain hostname cannot be updated after creation.
What is the correct way to add a domain to Front door?
