Activate the following features for CRM Billing in Customizing for Customer Relationship Management under  Billing Configure Application :

Then click Generate Application.

Specify all claims-related item categories that are relevant to CRM Billing under  Billing Define Billing Relevance of Item Categories .

Set their billing relevance to Value-Based Billing After Approval.

Specify the billing types that are required for:

You do this under  Billing Define Billing Types .

Specify the billing item categories that are required for:

You do this under  Billing Define Billing Item Categories .

Assign the claims transaction types and item categories to the billing item categories under  Billing Item Category Determination Assign Item Categories .

Under  Billing Integration Transfer of Billing Document to Accounting Transfer to Accounts Receivable (FI-AR) and Accounts Payable (FI-AP) Enhanced Account Determination Assign Symbolic Account Key , assign:

Assign accounting document types under  Billing Integration Transfer to Accounts Receivable (FI-AR) and Accounts Payable (FI-AP) Assign Document Types .

Maintain the settings in Customizing for prepayments under  Billing Integration Transfer of Billing Documents to Accounting Transfer to Accounts Receivable (FI-AR) and Accounts Payable (FI-AP) Define Parameters for Prepayment .

Specify the payment block and special payment terms for prepayments under  Billing Integration Transfer of Billing Documents to Accounting Transfer to Accounts Receivable (FI-AR) and Accounts Payable (FI-AP) Define Parameters for Prepayments .

Define the data exchange necessary for business partners to enable the vendor-based FI-AP integration. For more information, see SAP Note 883162 configuration guidelines for vendor data exchange.