Hard drive mapping from Active Directory

Hi, I’m a noob at mapping hard drives using Active Directory.

I want to set up a folder for each user in our company. I want to name it ‘U’ drive.
I want the users to have the ‘U’ drive available whenever they log into the company domain.

This is my first job doing Network Administation so, go easy. I googled for a couple of days to figure out how it was done, but I don’t know the exact terminology to find what I’m looking for. (mapping hard drives from active directory)

I just like to add that at school, when I log on, I get my own space that I can store my school projects on. This space is available only to me. I get 1 Gig of space. So it’s cool that I have a back up of my work at school. I like to do that here at work.