User Names and Passwords Across 2003 Domain

I have multiple member servers running Windows 2003 Server R2 with a 2003 R2 Server running as the Domain controller. Problem is, each server has shares that each and every user has to have access to. The way security is set up they have to have a user name and password set up on each server to access the shares that they need.

Question is: Is there a way to have the Domain Controller sync the User Names and Passwords that are stored on it to each of the Member Servers without making them backup domain controllers?