Centralized Agent Upgrade (CAU) upgrade history only displays for 12 hours
Release : 12.3
Component : AUTOMATION ENGINE
By default, only the Centralized Agent Upgrade (CAU) executions of the last 12 hours are displayed. You can change this default period using the DEFAULT_TASKLIST_TIMESPAN parameter in the UC_SYSTEM_SETTINGS variable. For more information, see DEFAULT_TASKLIST_TIMESPAN.
Also, you can get older executions regardless of the definition of the DEFAULT_TASKLIST_TIMESPAN parameter by setting the relevant time frame in the filter options. For more information, see Filtering the Contents of the List.