Change default home folder location to a NAS in Linux Ubuntu 14.04 LTS

Hello all,
I am trying to achieve two goals on a new Linux Ubuntu 14.04 LTS and Windows 2012 R2 environment:
1. I would like to change the default home folder for the Linux users to point to a new NAS storage, how do I do that? I would like to make sure people cannot see each others home folders, and that they have a 1TB quota each. Can this be done from Linux?
2. Can I auto map a network drive for all users login in to the Linux to another NAS folder?
3. I have just linked the Linux to the Windows 2012 AD, so user accounts from the Windows can access the Linux, is this something I can set from the GPO?

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Duncan RoeSoftware DeveloperCommented:
If you make /home rwx--x--x then only root can list the contents. So users can't "see" each other, but can cd if they know another's name

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