Lock down shared files on Microsoft Server 2000 to LOCAL access only

Hi, Experts,

I need to lock down files shared over a Microsoft Server 2000 machine and Active Directory to local access only:  Users logged in to the Domain with appropriate access can edit, etc. but once the file is taken outside of the Domain it cannot be opened.

Is the easiest way to use Encrypted File System?  Are there other better solutions?

I know its out there and I've been looking around for instructions but I haven't found much.  Thank you very much in advance!
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Brian PiercePhotographerCommented:
If users have the ability to edit the file then EFS is not going to stop them copying it - if they can access the file, then they can create an unencrypted copy.

The only practical solution to this is to use Information Rights Management, but as far as I know this is only available for Server 2003/2008 (see http://www.microsoft.com/windowsserver2003/technologIEs/rightsmgmt/default.mspx)

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OGSanAuthor Commented:
Thank you, KCTS!
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