yes, U are right. the system confirms a particular date even if the PO has not yet been created. this date is not a correct one, since there is no availbility check at sales order level for third party. Once u create a PO, there u will get the scheduline lines get confirmed.(ie., vendor's confirmation date or PO schedule line.
This shecduline line will be automatically copied or updated to the sales order schedule line. Hope i answer ur question.
reward points if useful
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