HI All,
We have a requirement were the sales invoice has to posted before pick/pack (AWMS). went through a community forums and found that it is not available in standard (Not possible).
If we have to customize the same, is it advisable and what would be the right approach. 
Scenario:
We have order and a prepayment created.
Prepayment is posted on the same date of the order creation.
were in the invoicing can be done only after the warehouse processes. now we need to post invoice on the order date itself. please advice relating to the approach for customization. 
thanks,