System to generate separate project billing invoices for each Expenditure Organization

Summary:

We have a requirement where the project will have costs incurred from multiple departments and they will use "Cost Reimbursable Invoice" to generate the billing invoice and we need to configure the system to generate separate invoices for each expenditure organization and capture department value in a DFF so that they can filter the receivable invoices based on these department in AR side. Could you please let me know how to achieve this as in the invoice format there is no option as expenditure organization for grouping.

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