Hi ,
If you are doing migo with ref. to multiple Plant , You have to write EXIT/Badi for different plants.As per my knowledge there is no config that issue msg regarding multi plants.
some useful badi that may help you as below.
MB_MIGO_ITEM_BADI BAdI in MIGO for Changing Item Data
MB_MIGO_BADI BAdI in MIGO for External Detail Subscreens
MB_ME_CSGMT_BADI_SAP BAdI: Consignment Processing - Stock Transfer
MB_DOC_BADI_INTERNAL BAdIs During Creation of a Material Document (SAP Internal)
MB_DOCUMENT_UPDATE BADI when updating material document: MSEG and MKPF
Thanks
Abhishek