The thing is that these are calculated properties generated on the fly, and they won't be displayed in the built-in reports available in the Web Interface. You have 2 options how you can workaround this:
- You can generate a report you need with the help of a script.
- You can create a Scheduled Task that will bu run, say, once or twice a day and 'stamp' all users with the number of days left until their password expires. The number of days left will be stored in a certain property of the users' accounts. Then, you can add the property to the Web Interface to show when a user's password expires.
Which one suits your needs better?