Outlook.com was working perfectly for my domain until I changed the A record and the nameservers in accordance with our new hosting provider. Then the email stopped working. When I log into Windows Live Domains Admin Center, my domain has a status of "Pending DNS configuration". There is an alert saying I need to prove ownership of my domain. I deleted all the existing DNS records and set up the necessary MX and TXT records. However, when I click to refresh the alert message in the Admin Center, it refuses to go away.