Win2K3 AD – Who modified last, Where users log in to…

Hey All,

How would one person do a serious audit of AD?

I need to know:

Who created a user and when.
Who modified a user, password change, move to a different OU.
Where does this user log into.

I was hoping this would be easily researchable, but I seem to not be able to find the right key words.

Thanks!!