How can I enable cached logoins on an active directory network?

I have been given the task of setting up about 40 macbooks on my 300+ Windows network running Active Directory (Welcome me to the Mac world..... now!)

I am able to bind them fine and log in with my AD user accounts and such, quite simple actually, I was impressed....

What isn't so impressive is that the Mac apparently doesn't default to caching the AD login information by default like a Windows laptop does.

Example:

My users can log in to their macbook when on my network.

At home, my users can NOT log in using their AD user name and password.

How can I set the macbooks to cache this login information?
Thanks in advance.

JB

10.6.4