3.2.5.2 Receiving a Kerberos Message Response
When the KKDCP server receives the Kerberos message response, it SHOULD:
Create a KDC_PROXY_MESSAGE (section 2.2.2) where:
kerb-message is set to the Kerberos message response.
target-domain is not used.
dclocator-hint is not used.
Send the KDC_PROXY_MESSAGE using the HTTP connection to the KKDCP client.