The EBS product is unique in that it is intended to provide a complete Windows based IT infrastructure for medium sized companies that is deployed all at once as a single product. During the course of the EBS deployment Windows 2008, Exchange 2007, System Center Essentials, Forefront Threat Management Gateway along with unique EBS software are installed and configured in a “best practices” deployment across three servers. Here’s a framework (screenshot) for thinking about the logical stages of EBS deployment with rough estimates of time for each of the stages and where “break points” exist during the deployment process. Note that your mile will vary on the timing of completing the tasks within the stages. These times are used as examples for planning purpose only.
Full Article: EBS Blog