Exchange 2010

Exchange Online and Exchange Server 2010
Exchange Server 2010 was designed from the ground up for services. Its rollout will enhance the capabilities of Exchange Online: lighting up new features, giving you more control over your hosted e-mail environment, and improving coexistence between hosted and on-premises Exchange deployments.
A beta of the Exchange Online service powered by Exchange Server 2010 will be available to businesses in the second half of this year. Organizations that move to Exchange Online today will benefit from an easy migration to the new version of the service, enjoying an “evergreen deployment” that gives administrators and users access to the latest Exchange capabilities.
Deployment choice and flexibility
Because Exchange Server is available both as on-premises software and a hosted service, you have the freedom to choose the right deployment option for your organization. Regardless of whether you choose to deploy Exchange Server on-premises, host your mailboxes with Exchange Online, or combine these two options in a hybrid deployment, your employees will have messaging and collaboration tools that maximize their productivity. Exchange enables your business needs, rather than technology constraints, to drive the choice.