Here we would like to draw your attention to WCFC_MSG_FLD_MAPPING transaction code in SAP. As we know it is being used in the SAP CA-WUI (WebClient UI in CA) component which is coming under CA module (Cross Application).WCFC_MSG_FLD_MAPPING is a transaction code used for Define Message Field mappings in SAP.
It comes under the package CRM_BSP_WD_CUST.
Transaction WCFC_MSG_FLD_MAPPING technical data table
|Purpose||Define Message Field mappings|