Hi All,
We need to import invoice transactions from the 3rd Party AP software into D365. There are 3 lines in 1 invoice. 1 line is shipping, the other line is tax. So we have to import the 3 lines into D365 as they are.

We want the Reject duplicate. We also don't want to put -1, -2, -3 at the end of each invoice number to differentiate them (screenshot 3) because we want to export them back into the 3rd Party AP software after the invoice is paid in D365. So, after we paid the invoice in D365, we have to sync this info back to the 3rd Party AP software to update the payment. So, we need to keep the original invoice # to allow sync back. Has anyone dealt with this issue before? How do you post these 3 lines of the same invoice number in D365 without Reject duplicate and without putting any dash or dot to the invoice number? I appreciate all feedback.

