3.6.5.2.1.4 Connection Disconnected
When a CONNTYPE_TXUSER_PHASE0 (section 2.2.10.2.1) connection is disconnected, the transaction manager communicating with a resource manager facet MUST perform the following actions:
If the connection state is Awaiting Phase Zero Response:
Otherwise, if the connection state is Active (section 3.6.1.3.3):
Signal the Enlistment Unilaterally Aborted (section 3.2.7.19) event on the Core Transaction Manager Facet with the Enlistment object that is referenced by this connection.
Finally, in all cases, the event MUST be processed as specified in section 3.1.8.3.