You are creating integrations in Oracle Integration Cloud (OIC) using B2B trading partner agreements.

Comprehensive and Detailed Explanation:

In OIC B2B, outbound agreements use theEDI Interchange ID (B)as the implicit identifier. This ID, part of the EDI header, uniquely identifies the sender in transactions (e.g., X12 or EDIFACT standards).

Option A:Internal Sub ID is a secondary identifier, not implicit for all outbound flows.

Option C:Application Partner ID is specific to application-level config, not EDI.

Option D:Group ID Qualifier defines document grouping, not the primary outbound identifier.

The Interchange ID ensures consistency in B2B communication.