You can use the fields from the above report to plan the number of days to be selected for user notification using a simple calculation as given below,
Required fields from the report are,
The formula for,
For example,
If the value for Password Last Set = Oct/1/2013,
Max Password Age = 20, Current Date = Oct/10/2013
Days for sending user notification = 20 - (Oct/10/2013- Oct/1/2013)
= 20 - 9
= 11
So in this case, you can set days for user notification as either equal to or greater than 11 for confirmed user notification and avoid empty summary report generation.