3.3.6.1 Context Handle Rundown
When the RPC runtime indicates that a context handle associated with a session is being run down, the participant MUST remove the associated session object from the session table, and close any context handle or binding handle stored in the session object. (See [C706].) Once this has been done, the MSDTC Connection Manager: OleTx Transports Protocol MUST notify the level-two protocol that a teardown has occurred by signaling a Session Down event as described in [MS-CMP] section 3.1.7.2.
Note Context handle rundown SHOULD be asynchronous with respect to the normal operation of the protocol. It is the responsibility of the implementation to ensure that session's state remains consistent.