Bline date

Hello all,

We are currently on SAP 4.6C and I hope you can help me with the following question(s)

Within Accounts Receivable when we change the payment term on an invoice document it automatically changes the bline date. Is this standard SAP? Can this be switched off within configuration that the bline date doesn't get changed when the user changes the payment term?

Also do you know what else besides payment term within a posted document can influence the bline date?

Your help is much appreciated and will be rewarded with points.

Latifa