This was built in relation with T&M journal and is there for all EMME.
Logic:
EMME is trying to post and Message occurs contained /PACG/ECM_I_MSG_E
Connector deletes original in cloud
Connector send duplicate with Error Message in UDF /PACG/ECM_MSG_U – UDFID for Cloud Message Type
Duplicate appears in T&M Journal with error info and user post-process
Idea is that business user is not looking / handling IDOC errors but getting it in T&M UI