Import sets are automatically deleted before 7 days when OOTB business rule "Update Occurrences" is executed Issue If Instance is using Workplace Calendar Synchronization of version 2.1.2, The Out of the box Business Rule "Update Occurrences" when executed deletes all available import sets (including less than 7 days)ResolutionThis issue is fixed in updated version of plugin 2.2.1Instance needs to update with the plugin version If Instance is still using the old version of plugin needs to add below "condition" in the Business rule.(new WSDRSpokeEventService().occurrancesFound(current.event_id))