Is it possible to download OAB onto a computer not on domain

We have a sister company on our MPLS network but they are not on our domain.   Would it be possible to give their computers (different versions of Outlook) access to the Addressbook?   They are currently using POP3 to get their mail.  I was just trying to provide them access to the addressbook.   Can anyone tell me if it is possible and what steps to take to make it happen.  Currently running Exchange 2010 server on Windows 2008r2.

Thanks.
patrickmillerAsked:
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Adam BrownConnect With a Mentor Sr Solutions ArchitectCommented:
If they have mailboxes on your domain, you would just have them connect to those mailboxes using Outlook Anywhere and that information would be available to them automatically. If they don't have mailboxes on your domain, it really isn't possible to give them access to the OAB without a custom utility or program, since access to that is handled by Outlook through RPC or Outlook Anywhere only. In addition, the email addresses used in the GAL are not routeable for any system that is not directly connected to the Exchange environment. You would need to export the GAL/OAB to a file or database and have the other users import them somehow. http://community.spiceworks.com/how_to/show/1288-export-gal-contacts-into-an-excel-file-for-distribution has a guide on exporting the GAL/OAB from an outlook client that may work for you. Note that any time your GAL/OAB updates or changes, you'll have to do this again.
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AmitIT ArchitectCommented:
Better to create mailboxes for external users into your domain and let them use Outlook Anywhere.
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patrickmillerAuthor Commented:
I am trying to use Outlook anywhere but when running the test of the Micorsoft Remote Connectivity analyzer I get all the way through until I get the PPC_S_server_unavailable error (ox6ba) was throuwn by the RPC Runtime process.    What is missing?
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patrickmillerAuthor Commented:
RPC_S_Server_unavailable
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Adam BrownSr Solutions ArchitectCommented:
Check to make sure you have Outlook Anywhere enabled, first. Then ensure that your Autodiscover configuration is set up properly. Also make sure you have a valid Third Party certificate assigned to the Exchange server services. Also, is this Exchange installation running on a Domain Controller?
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patrickmillerAuthor Commented:
It is enabled.  It is not running on Domain Controller.   We have a valid 3rd party certificate.  How do I tell if Autodiscover is configured properly?
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AmitIT ArchitectCommented:
goto to exrca.com and test it. What do you mean by Domain Controller here? Not running
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patrickmillerAuthor Commented:
Server is not running on a Domain Controller.
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