How to change the mailbox name in outlook 2003 and/or 2007

Question

I'm trying to see if there is a way to change the mailbox name within Outlook using C#.
Because our company changed it's policy recently, half of our users have their mailbox name as their email address (ex: [email protected]) and half have their name as "Joe Blow".  We'd like to get them all consistent with the first format.  Is there a way to do this programmatically?
Thanks in advance for any help!