Customer of DS7.5 SP1 would like to see the "re-run failed task" functionality to be re-introduced.
"In DS6.9 it was possible to double-click a task schedule under Task Status, select any machines that the task failed on, right-click, and choose Start Now to immediately re-run the task on those clients."
"This was very convenient when you wanted to retry a task that had failed on some clients. This option does not exist in NS7. You can restart the entire task, with all of the devices that succeeded and failed, but to run the same task again on only failed clients you have to create a new schedule and manually add those clients to that schedule."
From:
https://www-secure.symantec.com/connect/idea/re-run-failed-tasksjobs-ns7