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Exchange 2010 DAG deployment strategy

Posted on 2014-03-27
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Hi,

Just looking for some deployment advice.  We have 2 multi-role exchange servers (HUB,CAS,MB) in 2 active directory sites connected with a 100mbps VPLS tunnel.  Server A is currently in production and we'd like to extend DAG to server B.

I know that in a 2 member DAG we will need a witness server.  Can server A also be a witness server or is it better to have a third server perform this role?  

Can the 2 exchange servers remain multi-role or should I separate HUB and CAS onto their own server in each site?  This isn't a particularly large exchange environment.  There's less than 100 mailboxes.

I would like to keep things as simple as possible.

Thanks for the input.

BZ
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Question by:tnorman
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by:Mahesh Sharma
ID: 39959159
1. You need to have a third server acting as Witness server
2. You may utilize multi role on single Exchange box.

Check below useful  articles:

http://www.msexchange.org/articles-tutorials/exchange-server-2010/high-availability-recovery/designing-site-resilient-exchange-2010-solution-part2.html

http://technet.microsoft.com/en-us/library/dd979781(v=exchg.141).aspx
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Mahesh Sharma earned 2000 total points
ID: 39959163
Also you need to switch DAC mode for DAG if you have two data center scenario
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