When I tried to setup a new service, the above error appeared. The domain I entered was ‘aaa.example.com’, a subdomain of the domain in the message, and they are not exactly same. The domain sure belongs to our company, so probably it’s someone in our company that registered it, but nobody knows who it is. What shall I do? Is there any way to know who the user is?
If you open a support ticket (with the actual domain) we can take a look. We will protect the apex and all subdomains with certain exceptions (like some cloud provider domains).