3790256 - AS2 Message Failed Due to MLS Certificate Mismatch

AS2 messages are shown as Error with Status Description indicating a negative MDN response

SAP Traceability Hub

The trading partner returned a negative MDN with the error authentication-failed because the message signature could not be authenticated. 

This occurs when there is an MLS certificate mismatch between SAP Traceability Hub/CPI and the trading partner system. The certificate configured for signing the AS2 message does not match the certificate maintained by the receiver for signature verification. 

As a result, the receiver rejects the message and returns a negative MDN with the disposition authentication-failed. 

1. Verify the MLS/signing certificate configured in SAP Traceability Hub/CPI. 
2. Confirm that the same certificate is registered and active on the trading partner side. 
3. Review certificate validity and ensure the certificate has not expired. 
4. Update the certificate configuration if a certificate renewal or rotation has taken place. 
5. Reprocess the message after synchronizing the certificate configuration between both systems. 

AS2 Message Failed, Negative MDN, authentication-failed, MLS Certificate Mismatch, Certificate Verification Error, Digital Signature Validation, Supply Chain Partner Collaboration, U.S. Transaction Exchange, SAP Traceability Hub  , KBA , IS-LS-ICH-NET-CER , SAP ICH Message Exchange Issues Certificates , Problem