From the Automation Center navigation pane, select the task from the Tasks > All Tasks or Tasks > <task type> Tasks list. The Task Details for that task displays.

Click the Instances tab. A list of instances for that task displays.
 
You can change the default time constraint for the display of task instances on the tab via the Task Instances Tab Time Constraint user preference.
 

Click the Details icon next to any Instance Name on the list to display the Details for that task instance. 
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