transfer data between two exchange server

How can I transfer all database from one Exchange server to another Exchange server?

Example:

I have in Computer A there is Exchange Server, there is more then 200 users and all user email are available on server. Now I want to all database copy from here to Computer B, How I can do this.

 
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thabashAsked:
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SembeeCommented:
Whats your goal?
Is this a move to a new server?
Or backup purposes?

Simon.
thabashAuthor Commented:
te goal is to move to a new server

and to have a backup server (test environmet)
NiclasHCommented:
You don't mention with Exchange server version but have a look at http://www.msexchange.org/tutorials/Migrating-Exchange2000-Exchange-2003-Hardware.html

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