The service pack will include both fixes and new features.
Some of the new features are:
- Archiving. You will now be able to create the archive mailbox in a different mailboxdatabase than the database where the user mailbox are located. This finally gives the archive feature the benefit of being located on slow and cheap storage.
- Multi-Mailbox search feature - improved
- Outlook Web Application - new features
- Active-Sync - new features
- New managmenet UI - extended commands