#define RPC_NT_INVALID_STRING_BINDING ((NTSTATUS)0xC0020001L)
MessageId: RPC_NT_INVALID_STRING_BINDING MessageText: The string binding is invalid.
MessageId=0x408 Facility=System Severity=Error SymbolicName=STATUS_USER2USER_REQUIRED Language=English Kerberos sub-protocol User2User is required. . This code is used by .Net server. reserved.