You can use Inbound Event to locate the inbound message and trigger its processing. The type of inbound event depends on the mechanism/protocol used for receiving inbound messages. EDI Accelerator supports File, JMS, or FTP protocols. In case of any other, you need to use the VL Trader Host.
You can use this in an Inbound Relationship when you need to receive any inbound message.
For details on creating a JMS/File/FTP event, refer to the Adeptia Developer Guide.