How are people accessing our folders that are on the domain?!

hi guys,

We are in a domain environment. People are able to access a shared folder on the network. The name of the server is Server1. The only group in the NTFS security, is the 'Server1\users' group which relates to the local group!! This group has read/write and write.

We are talking about people on our domain, able to access this folder. I logged onto the server locally and in the 'Users' folder, these people are not even inside it. We don't get it though. How is that possible? Is there something I'm missing about NTFS permissions here? THe servers are Windows 2003.

Cheers
Yashy
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YashyAsked:
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Joseph MoodyBlogger and wearer of all hats.Commented:
Who is a member of the users group on that server? By default, authenticated users (every user in the domain) is a member of the local group users.
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YashyAuthor Commented:
Okay, I've just seen that there's a group in the local Users folder: nt authority authenticated users (s-1-5-11)

I am on the uk.fc.local domain. This security group above is on the server which is on the contoso.local domain. People on the uk.fc.local domain can access the contoso.local folder.
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Joseph MoodyBlogger and wearer of all hats.Commented:
So NTFS is behaving exactly like it is suppose to then. Authenticated Users is inheriting the read/write permissions assigned to your folder through the Local\Users group.

To fix this, add in a domain security group that contains just the members needing read/write permissions to the Access Control List of that folder. Disable inheritance. Remove Users.
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YashyAuthor Commented:
Thanks for the help Joseph.

But this is what I don't get. The server which has the 'NT Authority\Authenticated Users' set up on it is on the contoso.local. I am on the uk.fc.local domain. So how can there be an inheritance of permissions when I am on a totally different domain?

Is it because there is a trust between the two domains?
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Jeff GloverSr. Systems AdministratorCommented:
Are the domains in the same forest? If so, then yes there are automatic Transitive Trusts in place
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YashyAuthor Commented:
Thank you
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Windows Server 2008

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