Invoice Consolidation with Multiple Shipments

Dear All

I am working on this below requirement, i refer the White papers what Version 8.9 onwards Item consolidation not happening on Invoice if those items are shipped from different Ware house on the same sales order or having different Shipment No's.

But My requirement is

If an order splits and ships from multiple warehouses, customers still want to receive a consolidated invoice for that order.  

Version 9.1

Any suggestions are appreciated

Thanks/RAO