1.3.1.3 Context Properties and ORPC Calls

Context properties can participate in out-of-band communication on ORPC calls. Via the Context ORPC Extension mechanism ([MS-DCOM] section 2.2.21.4), a client-side context property and a server-side context property can pass information back and forth on ORPC calls. In some cases, such communication is influenced by an envoy context property returned from the server during the marshaling/unmarshaling process. For example, during an ORPC call a transactional COM+ client object can send extra information about the state of the current transaction to a COM+ server object.