Planned order from APO to R/3

Hi Team,

In our landscape, we have APO & R/3 (ECC). The planned orders will be generated in APO & it will be transferred to R/3 via CIF. I am referring some SDN posts like maintaining number ranges in OMI2 & OMI3. But i am not clear. Can anyone please guide me how to maintain number ranges (internal number ranges for planned orders) in OMI2 & OMI3, MD91 when it is getting transferred from APO to R/3?

Thanks