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I'm learning about Windows Server 2008 R2.

I was testing the trusts relationship between two different forests. But I haven't understood the purpose and advantages of this?

Can someone orient what is the purpose of this trust relationship?

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closed as not constructive by Ward, Magellan, HopelessN00b, mdpc, Brent Pabst Nov 8 '12 at 18:16

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

Pick up any one of William Stanek's Windows Server Admin books, everything you want to know is there. – Brent Pabst Nov 8 '12 at 18:16

Trusts allow for authentication and authorization across domains/forests so that user A from one domain can be granted access to resources in a different domain or forest. Check this Technet article.

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