Click on the monitors icon, right below the "Home" icon
Click on the logs tab
Leaving "Computer Status", "Default", and "Past 24 Hours" Click on "view log" button
Click on the definitions header to sort the log by definition date, I sort oldest to newest, might have to click the header twice. Then you can just scroll down the list to see who's out of date.
The java interface is slow so be patient.
This forum is doing wierd things today so who knows what this post will end up looking like, or if it will even post