3.1.5.4 Domain
The Domain resource exposes information about the topology information of the current server to the client. The client MUST discover the Domain URL by parsing the Link element in the GET response from the Root resource.
The Domain resource MUST respond with a 200 OK to every request and contain a Domain element in the body. The Domain element is defined in section 2.2.4.2.
The Domain element MAY contain any of the following links, depending on what is configured in the topology. The links are identified by tokens for which semantics are defined in section 2.2.5.5.
Internal/Autodiscover
External/Autodiscover
Internal/AuthBroker
External/AuthBroker
Internal/Ucwa
External/Ucwa
The SipAccess types might also be present in the response, depending on what is configured in the topology.