Import Outlook Contacts to Active Directory

Hi,

I have a client that currently has a number of Distribution Lists setup in Outlook. They are at the point where they have reached the limit of the DL's, and cannot add anymore members to the lists.

I was thinking that I could import these contacts into Active Directory and setup Distribution Lists there. I have seen some articles that explain how to do this, but I haven't had any success.

My questions are:

1: What is the easiest way to import the conatcts into AD?
2: Is there a way that the users can update the Distribution List in AD on their own?

Thanks