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Simple Exchange 2010 DAG Setup

Hi Team,

I need to setup a small network for around 200 users and need to ensure there is some redundancy regards to email.

Currently the client has a Single Windows 2003 Domain with 2 domain controllers and 1 exchange 2003 server.

We are upgrading the Domain Controllers to 2 new 2008R2 DC's.

We would like to have two new Exchange 2010 servers, one as a primary and the other a backup server, so if the main Exchange server was to die the other would take over and work without any input.  This also applies to users being able to fully use outlook client rather so email will come in and out.

From the reading i've done i think i need a simple DAG setup but it also needs to act as a client access server.  

Does anyone have any guides or can provide any help in what i'm trying to do here.

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Levi GwynCommented:
roger_patel - If you can swing it, you may want to build three Exchange 2010 servers instead of two.  Build a simple front-end box that does CAS only and two identical larger back-end servers that can be setup to do DAG.  You'll need a good amount of disk space on the DAG boxes also - DAG will hog up a lot of disk space.

The CAS box does not need to be very expensive (assuming all your servers are physical).
roger_patelAuthor Commented:
I've looked into that however we want two cas servers, so if one fails the other will kick in.  Our goal is to have a system that will allow minimal downtime if one of the servers was to fail.
roger_patelAuthor Commented:
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