MV45AFZB-User Exits SD-Material Maintenance. CRM_ORDER_MAINTAIN-Test program for function module CRM_ order _MAINTAIN CRM-Business Transactions. SDRQCR21 - Recovery of sales and Delivery Requirements SD-Basic Functions. CRM_ORDER_READ-Test program for function module CRM_ order _READ CRM-Business Transactions. CRM_ORDER_SAVE-Save document CRM-Business Transactions. RSNAST00 - Selection Program for Issuing Output SD-Output Determination.