Have a look at the Article by the Exchange Team.
- Adding the flexibility to provision a user’s Personal Archive to a different mailbox database from their primary mailbox.
- New server side capabilities so you can import historical e-mail data from .PST files, directly into Exchange, as well as IT pro controls to enable delegate access to a user’s Personal Archive.
- SP1 updates the Exchange Management Console with new tools to create Retention Policy Tags
- Made several improvements to the Multi-Mailbox Search features
- Support access to a user’s Personal Archive with Outlook 2007.
- Long running operations, such as attaching a very large file, will not block the rest of the OWA experience
- Users will also be able to share their calendars to anonymous viewers via the web
- In SP1, you’ll be able to add Web-Ready Document Viewing of IRM-protected documents as well and you’ll be able to do so in Safari on a Mac as well as in Firefox or IE on a PC.
- Updated EAS capabilities also enable support for send-as, support for notifying the user if their device has been placed on block or quarantine by their admin, full implementation of conversation view including the ability to sync only unique parts of messages.
Last but not the Least
- SP1 will bring several new management UI enhancements to enable a number of management tasks in the Exchange Management Console (EMC) and Exchange Control Panel (ECP). Here’s a taste:
- Create/configure Retention Tags + Retention Policies in EMC
- Configure Transport Rules in ECP
- Configure Journal Rules in ECP
- Configure MailTips in ECP
- Provision and configure the Personal Archive in ECP
- Configure Litigation Hold in ECP & EMC
- Configure Allow/Block/Quarantine mobile device policies in ECP
- RBACrole management in ECP
- Configure Database Availability Group (DAG) IP Addresses and Alternate Witness Server in EMC
- Recursive public folder settings management (including permissions) in EMC