I previously posted about the Exchange Server Deployment Assistant. The Deployment Assistant asks you some questions about your particular Exchange environment and, based on your answers, it provides a checklist with instructions that are designed to help you deploy Exchange 2010 quickly and easily. Each step has a huge amount of valuable information to guide you through your deployment.

This great tool has recently been enhanced to include rich coexistence information for those interested in maintaining some users on-premises and some users hosted by Microsoft Office 365 for enterprises in the cloud. As of now, the available scenario is targeted solely at those organizations with a current Exchange 2003 on-premises implementation, but additional scenarios for supporting Exchange 2007 and Exchange 2010 will be coming soon.

The Exchange Server Deployment Assistant can be found here Be sure to bookmark it!