2802958 - How to subsitute/validate custom fields on cloud systems

This KBA explains how to subsitute/validate custom fields on cloud systems

SAP S/4 HANA Cloud

Actually the custom fields (which are created in fiori app "Custom Fields and Logic") are supported exclusively in BADI

FIN_ACDOC_EXT_SUBSTITUTION for Creation scenario

FIN_ACDOC_EXT_CHG_SUBSTITUTION for Changing scenario

FIN_ACDOC_EXT_REV_SUBSTITUTION for Reversion scenario

These 3 BADIs are designed to handle custom fields in both IN and OUT parameters.
And in the OUT parameter, these BADIs contain only extension fields.
It needs to create the BADI implementation separately for extension fields.

Custom fields, substitution, validation, clould , KBA , FI-SL-VSR-2CL , Validation, Substitution and Rules (Public Cloud) , How To

SAP S/4HANA Cloud Public Edition all versions ; SAP S/4HANA Cloud all versions