Before we can federate this domain, we need you to confirm domain name ownership for {0} by adding the record type supported ...

Before we can federate this domain, we need you to confirm domain name ownership for {0} by adding the record type supported by your domain name registrar to the DNS settings.

TXT record:
Text: {1}

MX record:
Destination: {2}

You will need this setting in place to complete AD FS installation.

{3} about verifying DNS ownership for Azure Active Directory domains