System Leave Opening balance is the option to enter the balance leave eligibility of the employee on a specific date, before starting the system. Once opening balance is approved the next eligibility is calculated from that date (opening balance + leave eligibility of days after opening balance)

Once any leave transaction is entered in the system; then the system will not allow to enter the leave opening balance for those employees.

Leave Transaction means any leave related entries like Leave request, Leave Settlement, Leave opening balance, etc