How add a second mail server to exchange 2010 infrastructure

I would like to add a second mail server exchange 2010 at our mail infrastructure. Currently we have a server with all roles installed on and would like to add a second server with only  mailbox roles installed on   for load balancing. Moreover, I wonder how I can move mailboxes from one server to another,
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Elmar KoschkaSenior System EngineerCommented:
in emc you can move a mailbox to another server. See
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pozlu0Author Commented:
Thanks to everyone for the response,
I do not know how to install the new server with only the mailbox role installed
Elmar KoschkaSenior System EngineerCommented:
its a role in setup of exchange. start the setup.

after that create a dag like this:
pozlu0Author Commented:
Ok thanks but if want to install It without being a dag server but only a "stand alone" mailbox server how can I perform this?
thanks for the invaluable assistance
Elmar KoschkaSenior System EngineerCommented:
pozlu0Author Commented:
If I understand it I have to set only the mailbox role and that's when the setup is correct?
Elmar KoschkaSenior System EngineerCommented:
yes thats it

after that you move some mailboxes to new server

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