Unlock Date helps you protect Locked periods in System Prefs from Unlock Periods.
Unlock Periods is a Special Access setting for an Employee to change locked periods. By setting an Unlock Date you limit changes to on or after the Unlock Date you set.
Pictured, the system is Locked through May 2025, Invoices are locked through 6/30/25 and only an Employee with Unlocked Periods is unlocked back to and including 1/1/25.