The Exchange Team is announced that in the second half of calendar year 2011 we will be releasing Exchange Server 2010 Service Pack 2 (SP2) to our customers. With SP2, the following new features and capabilities will be included:
•Outlook Web App (OWA) Mini: A browse-only version of OWA designed for low bandwidth and resolution devices
•Cross-Site Silent Redirection for Outlook Web App
•Hybrid Configuration Wizard: Organizations can choose to deploy a hybrid scenario where some mailboxes are on-premises and some are in Exchange Online with Microsoft Office 365.
•Address Book Policies: Allows organizations to segment their address books into smaller scoped subsets of users providing a more refined user experience than the previous manual configuration approach.
•Customer Requested Fixes: All fixes contained within update rollups released prior to Service Pack 2 will also be contained within SP2.
Read more at source