The required configuration step when implementing self-initiated payments (SIP) in the bank account ledger is assign account symbol to payment methods. Self-initiated payments (SIP) are payments that are initiated by users directly in Bank Account Management without reference to an underlying transaction. The bank account ledger is a function that allows you to manage bank accounts and their attributes in SAP S/4HANA by using a subledger approach. The required configuration step when implementing self-initiated payments (SIP) in the bank account ledger is assign account symbol to payment methods, which allows you to link a payment method with an account symbol that represents a G/L account or a bank subaccount in the bank account ledger. References:

The fields of the input file that are part of the bank cash balance update when you maintain the connectivity path for remote bank accounts are value date and account ID. A connectivity path is a parameter that defines how data from remote systems or source applications are transferred into SAP S/4HANA for cash management purposes. A remote bank account is a bank account that resides in a non-SAP system or an SAP system other than SAP S/4HANA. A bank cash balance update is a function that allows you to update the cash balance of remote bank accounts based on an input file from external sources. The fields of the input file that are part of the bank cash balance update when you maintain the connectivity path for remote bank accounts are value date, which defines the date on which the cash balance is valid; and account ID, which defines the identification of the remote bank account. References:

SAP Bank Communication Management with payment approval allows you to create and approve payment batches, merge payments into a single file, and send them to banks via SAP Multi-Bank Connectivity. The payment medium is created after the payment merge execution step, which combines payments from different sources into one file per bank and format. References: