Block Trust between Child Domains Windows 2003

Posted on 2008-10-28
Last Modified: 2009-03-01
We currently have a single forest.  We have a top level domain and a child domain.  We acquired another company but do not want any resources shared between both child domains.  My understanding with Windows server 2003 Active Directory, all trusts are implied and Transitive.  Is there a way to force the two child domains to "never" be able to share resources or see each other's AD objects?  Is there a knowledgebase article to verify this is possible?  Child domains can see resources in the parent domain but should not see the other child.
Question by:Shenook
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LVL 30

Accepted Solution

LauraEHunterMVP earned 500 total points
ID: 22826873
Nope. Forests are the security boundary. If you want to isolate the new company's environment, leave them as a separate forest and create an external trust relationship between their forest and the root domain of your existing forest.
LVL 14

Expert Comment

ID: 22826982
If you have DOMAIN.LOCAL and you create CHILD1.DOMAIN.LOCAL and CHILD2.DOMAIN.LOCAL there is NOT a trust relationship between CHILD1.DOMAIN.LOCAL and CHILD2.DOMAIN.LOCAL unless you create it.
LVL 30

Expert Comment

ID: 22827056
If all 3 domains are in the same forest, then that statement is 100% false.  There is a two-way transitive trust relationship between all domains within a single AD forest.
LVL 14

Expert Comment

ID: 22827286
I stand corrected. Transitive trusts do extend to all domains within the same forest.

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