Moving average update for 3rd Party sales order

Hello All,

We have configured a 3rd party sales order process. The schedule line category is configured with account assignment categoory as "M". when we are creating GR the Moving average price of the material is not getting updated.

But if i replace with "E" it is getting updated, but the CO-PA is not getting generated for Profitability segment reporting.--we need profitability segment reportng.

Can some one tell me how we can update the moving average price using acc. asssignment category type "M" at the same time the Profitability segement information is updated.

THanks in advance

Appreciate your help

Arpita Rani