Hi Maris,
The structure CUAN_S_CE_IC_EXT_FAFL is used for interaction contacts in SAP hybris Marketing.
If you want to use customer specific attributes, you can add;
- For interaction contacts, using INCL_EEW_CUAN_CE_IC_ROOT include,,
- For interaction contacts and interactions, using CUAN_E_CE_IC_RT include.
If you want to add master data to the interaction contact via interaction, you can use INCL_EEW_CUAN_CE_IA_IC include.
Normally, attributes added to these includes are taken into consideration automatically.
You can find more infomation in official inbound interface guide: https://goo.gl/AF6oPQ
I hope this helps