The AuthenticationInfo structure defines the following properties:
AuthenticationInfo.Authenticated
AuthenticationInfo.CertificateAuthorized
AuthenticationInfo.ConnectionAuthorizationEnabled
AuthenticationInfo.ExternalSourceNetwork (Microsoft.Rtc.Sip)
AuthenticationInfo.ExternalSourceType (Microsoft.Rtc.Sip)
AuthenticationInfo.MtlsConnection
AuthenticationInfo.Origin
AuthenticationInfo.ReceivedFromInternalServer
AuthenticationInfo.SecurityToken
AuthenticationInfo.TlsPeer
AuthenticationInfo.TrustedConnection