Clustering Exchange 2007 with Microsoft Enterprise Server 2008 for Disaster Recovery

Hello
I support two sites, one in Stockton (192.168.121.X), one in Denver (192.168.122.x) connected under the same domain.
We were thinking of setting up Exchange 2007 on Server 2008 in a cluster for Disaster Recovery.
Has anybody had a positive experience with this?  Are other option would be to invest in a syncing application such as Double-Take but, would prefer to save on additional licensing cost if possible.
Feedback and suggestions would be appreciated.
checkonetwoAsked:
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tigermattCommented:

Hey,

I would probably suggest you look at DoubleTake rather than a cluster. With a cluster, you need Windows Server 2008 ENTERPRISE Edition, AND the Enterprise Edition of Exchange Server 2007 too. This could easily set you back several thousands US dollars if licensed properly, and based on your organisation size and the number of sites you have, a cluster might not be the best solution for you.

I would usually suggest the cluster route for companies with thousands of employees actively using email on a daily basis. If you aren't this large, Doubletake might be a better idea, since it is a quick, easy system to configure and get replication working, and it handles the monitoring and automated failover when you wish.

-Matt
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