Create a purchase order in other company without IC transaction

Hi all

I would like to create a purchase order with C/AL in another company.
However when I insert the purchase header, I find that the document number used the no. series of current company.
Which does not match the no. series in another company.
How can I create a purchase order in other company without using IC transaction?
Or How do I get the Purchase order no. series from another company?