Excel Adjustment load

Hi ,

          I can see that the Adjustment are done at transaction level , Mass update is a feature which gets exposed when we invoke it from adjustment page  . But I see that there is a Excel upload of adjustment feature , which I don't see in the User guide or Implementation guide . Can you guys provide me the Path and how it is done ?.

This is really needed since there are 1000 lines in a Order /Invoice and it will be difficult for the business to and do a mass update as it queries by Customer and Sales rep and not on  Order/Invoice #.