When a certain event has failed, there are several ways the SQL Sentry client alerts you.
In the Navigator pane, the text of the object is red to indicate a failed instance. In the Calendar view, the status bar for that event's instance is red. In the List view, the first cell has a red background.
To clear a failure, right-click on any of the above-mentioned instance views, and then select Clear Failed Status.
Selecting Clear Failed Status opens the Add Note? window and you'll be asked if you want to leave a note before clearing.
Alternatively, select Add/Edit Notes from the context menu to open the Notes window. Enter details about the failure and resolution taken, then select Save.
A message box appears asking if you'd like to clear the failed status for the object. Select Yes to clear all open failures for the object, and change Navigator nodes shown in red back to black. When clearing the failed status for a maintenance plan job, maintenance plan, etc., any related child or parent objects also clear.