3.2.3 Initialization
Before calling this protocol, the client application requires the following:
The URL of a service that provides a Federation Metadata Document, as specified in [WSFederation] section 3.1, with the fields and values as specified in section 3.3.<4>
The URL of a delegation management service that provides services as specified in section 3.2.4.<5>
A DNS TXT record containing a domain proof string, as specified in section 2.2.4.3, on the DNS server for the domain.