GetProxyTrustConfiguration Initialization

The client MAY maintain a cached copy of the data described in the GetProxyTrustConfiguration section.<1>

Prior to emitting a GetProxyTrustConfiguration request, the client MUST obtain the version number and GUID, as specified in [RFC4122] section 3, of the currently cached trust information. If no trust information is cached on the client, the client MUST use a version number equal to 0, and a GUID equal to 00000000-0000-0000-0000-000000000000.