Open Directory / Active Directory Integration

I've been tasked with integrating our mac envirionment into our Active Directory environment. What I would like to do is to have an open directory master manage all the mac computer accounts and have Active Directory manage all the user accounts. To do this i would like to create a trust betwen the OD envrionement and our AD enviroment. So basically when a user logs in the open directory will forward the request to AD for the user information. Any help or articles will be much appreciated. Thanks, Ryan