3.1.1 Registration and Authorization
During this phase of the message exchanges, the DSS establishes its identity to the USS, and the USS provides a cookie to the DSS that is to be used for the remaining requests. If this is the first synchronization, the USS creates an entry for the DSS in its data store. The following sections in [MS-WSUSSS] specify the message details:
Section 3.1.4.1: GetAuthConfig
Section 3.1.4.2: GetAuthorizationCookie
Section 3.1.4.3: GetCookie