Instead of using a consolidation rule, you can manually select billing documents for consolidation.
To consolidate billing documents:
The consolidation runs as a background process. Depending on the way in which your Salesforce org is configured, you might receive a notification or an email when the background job is complete. For details on how to monitor the process, see Monitoring the Progress of a Background Process.
Once the process finishes, the line items of billing documents that were grouped together are moved to a new consolidated document and the status of the original documents is set to "Superseded". Depending on the line limit set in Consolidation Settings, billing documents with the same field values might result in multiple consolidated billing documents.
Where fields (such as Customer Reference) have the same value on all the original billing documents, the value is used on the consolidated billing document. If an optional field has different values for multiple documents, the field is left blank on the consolidated billing document. When consolidating billing documents, checkboxes that contain conflicting values have the default value of the checkbox on the consolidated document.
Related Concepts
Consolidating Billing Documents
Consolidating Consolidated Billing Documents
Related Tasks
Consolidating Billing Documents Using Consolidation Rules
Adding to an Existing Billing Document
Creating a Consolidation Grouping Method
Creating a Billing Document Filter for Consolidation
Creating a Consolidation Rule, Record Filter, and Grouping Method
Monitoring the Progress of a Background Process
Reference