Check In Date attribute in Casper Environment

How many custom fields do you have?

The API that WHD use to connect to Casper does not provide that attribute that you need. However, the only alternative would be to use "Database View/Table as the discovery engine but you would have to create a view in your Casper database that has ALL the desired attributes you want in that view then configure WHD to connect to that view.

I had the same concern before and this is the alternative way of it.