By default, when fetching work orders, j5 filters work orders to those which have been released (so SHOW_OPTIONS_WITH_ACTUAL_RELEAS_DATE greater than zero). This can cause performance issues with very large SAP installations. The option Restrict Work Order Release Date tightens this filter to only fetch work orders which have been released since the start of the period being synced for new work orders, and only fetch work orders which have been released since the initial sync start as set in option Synchronize From Date.