For your Exception, click the "No Status" button in the Status column. 

Update the Status to  "No Action Required" or "Action Completed". This will mark the Exception as Resolved. 

radio_button_unchecked No Action Required

Another way to resolve an individual exception is to select the tick icon, like seen below. This action will 'resolve' the exception. 

Your Exceptions will show as "Resolved" in the Resolution Status column. 

How to resolve an individual Exception