AD root domain controller with 3 domains under separated by firewall cannot find domain

Hi,

We have a root domain controller with 3 sub domains. (domain A,B,C)
Each location is separated by a Firewall, But there is a trust between them.

I was able to permission Joe  from Domain A, as a local admin on a server in Domain B.
When he tries to logon through he get an error that the server cant find the domain

What can be the problem?
neoptoentAsked:
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Netman66Commented:
If no response then there's a firewall blocking things.  You may need to configure the firewall for DS, and DNS traffic.

http://support.microsoft.com/kb/832017
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Netman66Commented:
You need to setup Conditional Forwarding on each domain.

As an example:

On the Forwarder tab of the DNS server in Domain A, you would add Domain B and Domain C.

Do this for each domain so the other 2 domains are forwarders.

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neoptoentAuthor Commented:
also on the server i am logging onto i see a 538 type 10 and and then a 576  so it is authenticating....
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neoptoentAuthor Commented:
we have forwarders setup to go to the DNS servers
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Netman66Commented:
If you simply ping the NetBIOS domain name of the other domain from your workstation what it the result?

My guess is that it appends your own DNS suffix.

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neoptoentAuthor Commented:
doesnt append
but no response when using the fully qualified name
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