"Due on" date in FI for down payment request

Hi,

when we post a customer down payment request to FI, the "Due on" date (BSEG-ZFBDT) of the customer open item in FBL5N is always the same as the posting date, which means that the down payment request is shown as overdue after one day. In SD billing plan we have used a payment term, which for example says "45 days net".

We want to have the "Due on" date in FI line item to be in line with the payment terms, e.g. posting date + 45 days.

Is there any solution for this? I searched OSS and SCN, but didn't find a proper answer.

Thanks in advance!

Tobias