business area in sales order

Hi,

We are facing the problem that we will describe next:

When we create a order the field business area it is not available.

Till now the assigning in transaction OMJ7 was enought, in other words

the business area it is assign to a plant. So the business area was

equal to the plant because we assign it on transaction OMJ7 (at least

we are supposing that).

Now, we have the need of making some exceptions in some documents so it

will be useful that the field business area was open for user filling

because we need a diferent business area in accounting.

How can we do that?

We thanks in advance your best efforts to solve our problem.

Best Regards

João Fernandes