How to make DFS available to external domain?

Points of My Scenario:
1. I am admin of a Windows Server 2003 forest - with a single domain.
2. DFS is deployed on this domain.
3. Users map to file shares using the DFS name space.
4. I need users from an external forest & domain to also map to file shares using the DFS name space.
QUESTION: How do I enable users on an external forest to resolve the DFS name space of my domain?
waltforbesSenior IT SpecialistAsked:
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Krzysztof PytkoConnect With a Mentor Senior Active Directory EngineerCommented:
You need to use Forest trust between those forests. If you don't need anything from their forest/domains, you can create one-way trust. If you need to access also their resources then you need to establish two-way forest trust.

After that, they will be able to access DFS in your forest.

Before you can establish forest trust, you have to create stub zones of DNS or conditional forwarders in each forest to be able to access DNS names in other domain.

More about forest trust at
http://technet.microsoft.com/en-us/library/cc776940%28WS.10%29.aspx
http://technet.microsoft.com/en-us/library/cc756852%28WS.10%29.aspx

Regards,
Krzysztof
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GovvyCommented:
Set up a AD forest trust
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waltforbesSenior IT SpecialistAuthor Commented:
To Govvy: I have already setup an AD forest trust. I can even add users from this external forest to my domain local groups. However, these users cannot read the DFS name space. These external users can only access the file shares when they specify the FQDN of the file servers.
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