Email inbound action not finding watermark on HR tablesIssue Errors are seen in the inbound email logs when the watermark is unable to find the HR case source after the record has been transferred to another table: "Unable to locate sn_hr_core_case_payroll" CauseThe source is empty due to the transfer of the HR case. When this occurs, there will be an empty source record for the inbound email that was received in the instance. The empty source correlating to the watermark can be found on the sys_watermark.LIST table. Resolution Creating a business rule with the similar script logic below; -table: sys_watermark-when: async-run on insert-Condition: source_tableSTARTSWITHsn_hr_core_case(function executeRule(current, previous /*null when async*/) {// When HR cases are transfered, make sure all existing watermark table values match the new hr tablevar gr = new GlideRecord('sys_watermark');gr.addQuery('sys_id', '!=', current.sys_id);gr.addQuery('source_id', current.source_id);gr.addQuery('source_table', '!=', current.source_table);gr.query();while (gr.next()) {gr.setValue('source_table', current.getValue('source_table'));gr.update();}})(current, previous); Related LinksPRB1443306 has been created for this known problem. An alternative workaround would be to implement the logic within the business rule.