usersxit

Dear experts,

I would like to, at the time of order creation VA01, suppress fields when I enter the customer number in the order, that means the customer is maintained for two sales areas. The user must be able to use only one sales area and not get a popup of two sales areas as a choice.

The user must not get any popup and always be able to create the sales order for expected sales area.

Can you please identify any kind of user exit etc. for this?

Thanks