Want to change from Fully redelegated

I have added a domain agile.net and I don't want to have Microsoft manage it. I have set up the records on my DNS server and mail is flowing fine. But I need to add a second domain and can't because I can't get past the last step of setting up the first one where it wants to verify I have moved the name server. How do I tell office 365 I don't want to be Fully redelegated.