Contract with Multiple Parties

Summary

Creating Contracts with Multiple Parties (Suppliers and Customers)

Content

When creating a Sell enterprise contract to be used for billing, We are able to add only one customer and only supplier (our BU). We have a requirement that one contract be created for multiple customers and also be available to multiple BUs. Under the Parties tab of the Contract we are unable to achieve this. Can you please help us find a way to have multiple parties (both customers and BUs) on a contract?

Attached is the image of the error when trying to add additional customer and supplier.