SAP FI skills, CC and CI integration, FICA, BRIM Convergent Invoicing, SAP BRIM functionalities, Invoicing process Execution Process configuration, Scheduling Billing and Invoicing, AP AR and Dunning Processes, Billing process configuration, SOM CC, CI-Billable items management, Invoice outputs from CI, Customization of events in CI and FICA, SAP CI Convergent Invoice, Billing reversal, Contract accounts FICA