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What is X400 & X500 in Active directory.

Hi,

What is X400 & X500 in Active directory.
Can anyone tell me what these are and some example for these please.

Regards
Sharath
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bsharath
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bsharath
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1 Solution
 
Glen KnightCommented:
These are used for legacy Exchange Servers where are you seeing them?
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Mike KlineCommented:
x.500 is a standard for directory services  http://en.wikipedia.org/wiki/X.500
x.400 is a standard for messaging/communication http://en.wikipedia.org/wiki/X.400
The wikipedia entries on the subjects are good.
You can think of x.500 as the base for Active Directory.  Want to read about the history of Active Directory and how it came about and how these standards were incorporated.  
 
http://blog.joeware.net/2008/08/11/1420/
Joe summarized a thread from the activedir mail list...best discussion I've ever seen on the history of AD.
Thanks
Mike
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Glen KnightCommented:
Don't know why but I didn't see the reference to X500 :-(
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Mike KlineCommented:
...because you are going through so many questions.
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Glen KnightCommented:
:-)

probably!
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