AS2 and EDI Processing in SAP Cloud Integration: AS2 Adapter, MDNs, EDI Converters, Splitter and Validation

Keep this: job aid

AS2 and EDI step card

• Endpoints: /as2/as2/
  for messages, /as2/mdn/

  for async MDNs.
• Sender channel match: partner AS2 ID + own AS2 ID + message ID parts + subject, unique per tenant.
• Exactly Once: queue, MDN, retry. Best Effort: process, then MDN (customizable via SAP_AS2_MDN).
• Receiver MDN: sign + MIC requested and verified; enable Message Failure on Negative MDN.
• EDI Splitter: one functional group, homogeneous messages; Message mode for independent documents; no Gather/Join/Aggregator.
• Converters: one message; X12 one GS per ISA, one ST per GS; no repetition characters.
• XSD names: ASC_850004010.xsd (PO) or ASC-X12_850_004010.xsd (Integration Advisor).
• Duplicates: AS2 Message-ID, ISA13, idempotent step, customer PO check in S/4HANA.
• Outbound ISA13: one number range per partner and direction; continue legacy numbering at cutover.
• Triage: connection, AS2 adapter, splitter/converter, receiver/MDN, business result.