Update Posting Date when Posting an Invoice

Hello all,

I would like to update the Posting Date when Post/Invoice routine is started, is there anywhere in the setup an option to make that default? We have modules from different MS partners that allow us to Invoice a bunch of Orders by i.e. Bill of lading, some times over 200 orders, and we want to keep the posting date as a reference of the date when the Invoicing routine was started, and of course we do not want to update the Posting Date in 200+ orders manually.

Your help is much appreciated,

Cristiam