Multiple SES in one PO - ME21N

Hello,

I need to set up the ME21N in a way that in service POs will be possible to enter two or more SES. I know that the checkbox "Unlimited Overdelivery Allowed" needs to be checked for that, but the client does not want to have the "overdelivery" function, as to increase service quantities, but just the possibility to enter multiple SES until those quantities match the quantity in the PO item.

Thanks in advance!

Lisiane