This was built in relation with T&M journal and is there for all EMME.
Logic:
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is an equivalent of transaction /PACG/ECM_I_MSG_
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Connector deletes original in cloud
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Connector send duplicate with Error Message in UDF /PACG/ECM_MSG_U – UDFID for Cloud Message Type
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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
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T – E4C:Messages for Time Effort with send back to the cloud, meant for Expense objects. Please refer to the linked documentation page.