Why can't my Apple ID use a "domain owned by Apple?"
When I first set up my Apple ID, I used a gmail account. However, I have since created an @me.com (now @icloud.com) mail account. I have been able to attach it to my Apple account, but it says ↓ I cannot make my official Apple ID an email with a "domain owned by Apple"--i.e. @icloud.com. I'm trying to sever all ties to this old gmail I no longer use, and this is the only major thing left.
I do see this prompt ↓ , which I think is what I want, but when I push submit, nothing happens.
Help?
Apple ID