Amazon Web Services (AWS) provides a cloud platform for deploying Microsoft Windows based workloads, including Microsoft Exchange Server 2010.
This guide targets Exchange Server IT administrators and deployment engineers. It discusses the planning and deployment tools that you are already familiar with and discusses how to use these tools in the context of AWS environment. After reading it, you should have a good understanding of the architectural considerations and steps involved to plan and deploy an Exchange Server 2010–based messaging service in the AWS cloud.
Download the guide from here - http://media.amazonwebservices.com/AWS_Exchange_Planning_Implementation_Guide.pdf