2.1 Transport
The ROP input/output buffer, as specified in section 2.2.1, is sent as part of the payload of either the EcDoRpcExt2 RPC method, as specified in [MS-OXCRPC] section 3.1.4.2, or the Execute request type,<1> as specified in [MS-OXCMAPIHTTP] section 2.2.4.2.