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Modification of SAP Biller Direct for
FI-CA 
In addition to the system settings in the back end and in the Web application, you can modify the back end and the Web application as described in the following sections to better adapt them to your requirements.
Contract Accounts Receivable and Payable (FI-CA) is not included in mySAP ERP 2004.
SAP does not provide maintenance for modifications you implement yourself.
