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Foreign Security Principals - Active Directory - Basic Question

Posted on 2011-03-08
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Last Modified: 2012-05-11
Dear Experts,

In AD, within a domain, there are default folders/containers. There is one called ForeignSecurityPrincipals.

Can someone kindly explain the purpose of this for me in a very nut-shellish approach. I can;t find any good information on the net.

Cheers,
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Question by:ouch_mybrain_
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by:
KCTS earned 189 total points
ID: 35068226
It contains user accounts from external trusted forests
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by:loki_loki
loki_loki earned 186 total points
ID: 35068262
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Author Comment

by:ouch_mybrain_
ID: 35068310
Thanks guys. Now some follow up questions.

Do the accounts replicate/copy from these other trusted forests automatically, or, are the accounts simply shortcuts to data on the foreign domain controller's AD - so if the trusted domain became untrusted, I would be disconnected from the foreign accounts? How much control would I have over these "foreign" accounts - can I administer them?  Hyperthetical situation - can Domain A trust Domain B, but Domain B not trust Domain A?
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Expert Comment

by:KCTS
ID: 35068463
You can set up one way external trusts so that Domain A will trust Domain B but not the other way around
see http://technet.microsoft.com/en-us/library/cc961481.aspx
see also
http://technet.microsoft.com/en-us/library/cc779144(WS.10).aspx
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Author Comment

by:ouch_mybrain_
ID: 35069001
KCTS. Just to confirm, Foreign AD accounts will only appear if that domain has trusted you?
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Expert Comment

by:KCTS
ID: 35069248
They are from the domain that you trust
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Author Comment

by:ouch_mybrain_
ID: 35069280
It must be a two way thing, otherwise a domain could look at other domains' users without permission?
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Expert Comment

by:loki_loki
ID: 35069369
you can do it one way as KCTS says.  You have to accept a trust from both ends, whether it is one or two way.  Without the trusting domain (A in your example) accepting the trusted domain (B in your example) then B will not be able to look at A.
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Author Closing Comment

by:ouch_mybrain_
ID: 35069425
Thanks
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