In Idoc_input_ordchg function VBAK-VKBUR is not an input field ???

Hi,

After a migration, I have to update(change) the sales offices(VBAK-VKBUR).

Using the transaction VA02: sales office is an input file.

But I have to use Idoc method to update all the sales offices.

And in the Idoc_input_ordchg function, the vbak-vkbur is not an input field ???

Do someone has the explanation?

Thank you,

Regards.