Configure Zimbra to Migrate from AD Microsoft

Dear,

I'm already install zimbra opensource edition 8 on Centos 6 x64. I have another system using windows server 2003 as Active Directory. All desktop/workstation has join to Microsoft AD.

How to migrate from Microsoft AD to Zimbra + Samba for accomodate all desktop join to Domain and File Server Sharing security.

Target:
- all workstation can join domain to zimbra + samba
- all workstation can login using there account (email address)
- have file sharing server that security file is controlled by group from zimbra


Thanks for your help and guide

Andreas