This window allows you to close multiple sales orders in one step.
The window is designed to select Sales Orders either by a particular field and Operand or by a date range (recommended method). Once the criteria is chosen, click the Search button. The Sales Orders that are returned will have the Close check box already checked, all that has to be done from there is to click the Close Orders button at the bottom left. The Sales Orders will be closed according to the System Date (current date).
Located under Sales A/R > Mass Close Orders.