The Exchange Deployment Assistant is a web-based tool that helps you deploy Exchange 2013 in your on-premises organization, configure a hybrid deployment between your on-premises organization and Office 365, or migrate to Office 365. It asks you a small set of simple questions and then, based on your answers,
The first scenarios available show you how to deploy Exchange 2013 in an organization with no previous installations of Exchange and show you how to configure a hybrid deployment between your on-premises Exchange 2013 organization and Office 365. We’re working hard on additional scenarios, such as upgrading from Exchange Server 2007 and Exchange Server 2010. These additional scenarios will be added in the coming months.
The Deployment Assistant for Exchange 2013 is supported on most major browsers and has a completely redesigned interface that’s no longer dependent on Silverlight technology. Here’s a screenshot from the Deployment Assistant after the initial set of questions were answered and the customized checklist was generated.
Of course, we can’t forget about Exchange 2010! If you still need to deploy Exchange 2010, you can access the Deployment Assistant for Exchange Server 2010 at http://technet.microsoft.com/exdeploy2010.
Source: MSExchange Team