Hi,
The default PO document type is at transaction code level only. For automatic PO creation from MIGO, the default document type is defined in OLME- Define Default Values for Document Type. Here, check the document type assigned against transaction code MB01. In standard only this document type will be pulled during automatic PO creation.
You may go for development if required, to assign different document types as per the requirement. If you are going for development, I would suggest to maintain a ztable with company code, purchase organization and document type combination and pull the document type accordingly while creating PO from MIGO.
Regards,
AKPT
