Batch Number

Hi All

I go through the Batch Number manual and create the test Purchase order for automatic allocation of batch number, but what i notice here is when i invoice it, then it is generating the batch number. I think it should take it automatically.

Can you also give me an idea in respect to logistics who we can use and what is the use. What i know is through the batch number we can maintain the product which have the expiry date.

And one more thing, is there any report in AX through which we can generate the list o item which got expired in the stock.

thanks