@Alex Pirrotta your unbilled reclassification will never be 100% of what it should be until you import the invoices into the system. The challenge there is invoices cannot be imported against sales orders (just as stand alone). They can be created against S.O either by hand or using the script to transform sales order lines to invoice lines (line level mapping is required) but not csv imports. Depends on the functionality you are looking for, from your system, if you can live without reclass (until you import the invoices) then it will work. However to make use of existing reporting functionality that comes with ARM you will need invoices which are created against Sales order lines for correct recognized vs unbilled