Descending Sorting in Dunning
Description
As of Release 3.0A, you can sort the dunning notices, or dunning list, and the items within the dunning notices/list in descending order. To do this, you only have to set the option 'Sorting descending' under Environment -> Sort fields within customizing for the dunning procedure. This then applies to all sort fields. If the option is not activated, the system sorts the notices and items in ascending order.
Change system parameters in customizing
You maintain this option in the step 
"Set up dunning program" in the Accounts Receivable and Accounts
Payable Implementation Guide. After executing the function, choose
Environment -> Sort fields.