Researching this topic i have dicovered that TBP service uses the application properties of VALIDFROM and VALIDTO to save that data and uses property filters(this is where it's gets fogging).
The question is what does it manipulate and how using the property filters????
I am hovering the understanding that around when the time in the VALIDTO date has reached does it change the hidden property contained in the > details > settings > property > system = hidden property ?? using the property filters
Basically how does a normal search hide expired documents?
Which is the property that is used?
All concepts point me here. Any input will be great.