Report access in databases

Hey.

I would like to know if there is any way to generate report about access in the databases, because in our server we have a lot of people was deleted but the database still on server. So, I need to know how to generate report for to know who is live.

I´m sorry about English, I am from Brazil.

Subject: I found

I found a service in Server configuration document.That service calls License Tracking, so that service do what I wanted.

Thanks everyone.