Unable to access shared resources

soporte_synergy
soporte_synergy used Ask the Experts™
on
I am migrating from one domain to another.
all machines can ping each other, however I cannot open shared resources.
The message is: You might not have permission to  use this network resource.

There no antivirus enabled.

All DCs are Windows 2008 R2 SP1 functional level Windows 2008 R2, workstations are XP SP3 and Windows 7
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Author

Commented:
The problema is between domains. I mean, all machines in domain A can Access to resources in domain A, and all machines in domain B can Access to resources in domain B, but between domains are not possible.
Make sure user should have a member of global group to access resource another server.

For more info refer below link :

http://technet.microsoft.com/en-us/library/cc755692(v=ws.10).aspx

http://blog.imanami.com/blog/bid/34597/AD-Group-types-universal-groups-global-groups-domain-local-groups

Author

Commented:
Is not membership group, because is not able to contact shared resource, not appear authentication box
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Commented:
Machines in Domain A get their security authorizations from Domain A, and evidently, Domain A doesn't really know anything about Domain B. Worse yet, Domain B doesn't know anything about Domain A, so why should its resources allow you - an unauthenticated user (from its perspective) access?

You need to either:
1. Move the machines you want to switch from Domain A to Domain B. Then they'll be able to access resources in Domain B (but not A.)
2. Establish Trust between Domain A and Domain B. If all you want is for Doman A users to have access to resources in Domain B, then set up trust such that Domain B trusts Domain A - it doesn't HAVE TO be bidirectional. Of course, this would presume that these domains are in the same Forest, or they won't really know about each other at all.

Author

Commented:
This Works before for 2 days, machines in domain B could Access machine in domain A, using \\Server_IpAddress, then an authenticatin box appeared and users entered your credentials, but suddenly it no Works anymore. Any change was made
The problem is not resolution names, this Works OK, I can ping all machines using IP addresses or names.

Author

Commented:
I solve th issue

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