3.1.7.1.1 Problem with Server Certificate During a FileDiscoveryAttempt

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During HTTPS connection setup, the FileDiscoveryAttempt element judges the server's certificate by querying the BITS Peer-Caching: Peer Authentication section for the presence of the server's certificate in the table of peer certificates as defined in [MS-BPAU] section 3.2.6.1. If the certificate is not present in the table of peer certificates, the client MUST attempt to authenticate the server by an exchange of certificates via the BITS Peer-Caching: Peer Authentication Protocol; if this occurs, the client completes the FileDiscoveryAttempt element with the result RESULT_SERVER_CERT_UNKNOWN.<15> Otherwise, the client completes the FileDiscoveryAttempt element with the result RESULT_TRANSPORT_ERROR.