Exchange Server 2007 SP1 is now official and RTM. (new version : 8.0.535.0, Version 8.1 (Build 240.6))
Download it here : Exchange 2007 Service Pack 1
SP1 UM Language Packs are downloadable here
The SP1 Release Notes (read these, they are very important) can be found here.
Client Access Server Role Improvements
The Client Access server role includes enhancements for Microsoft Exchange ActiveSync and Microsoft Outlook Web Access. There is a new administration management interface for managing Post Office Protocol Version 3 (POP3) and Internet Message Access Protocol version 4 revision 1 (IMAP4). There are also several changes that affect the setup and configuration of proxying and redirection. Exchange ActiveSyncExchange ActiveSync in Exchange 2007 SP1 includes the following enhancements for the administrator and for the end user: An Exchange ActiveSync default mailbox policy is created.Enhanced Exchange ActiveSync mailbox policy settings have been added.Remote Wipe confirmation has been added.Direct Push performance enhancements have been addedOutlook Web Access Outlook Web Access is an ideal client for users who do not have access to Outlook, such as users who are traveling or who rely on shared workstations for access to e-mail and calendar information. Outlook Web Access was completely rewritten for Exchange 2007, which gave us an opportunity to add many new features. With Exchange 2007 SP1, the following new features have been added:Changes to Outlook Web Access Light With Exchange 2007 SP1, Outlook Web Access Light will monitor user activity so that Outlook Web Access does not time out while a user is composing a long entry.Changes to Outlook Web Access Premium The following features have been added to Outlook Web Access Premium in Exchange 2007 SP1: Users can create and edit Personal Distribution Lists.Users can create and edit server side rules.WebReady Document Viewing has added support for some Office 2007 file formats.Users will have access to the dumpster from Outlook Web Access and will be able to use the Recover Deleted Items feature.A monthly calendar view has been added.
Move and copy commands have been added to the Outlook Web Access user interface.
Public Folders are supported through the /owa virtual directory.
S/MIME support has been added.
Additional customization features as follows:
Ability to integrate with custom message types in the Exchange store so that they are displayed correctly in Outlook Web AccessAbility to customize the Outlook Web Access user interface to seamlessly integrate custom applications together with Outlook Web AccessPOP3/IMAP4 A new administration user interface has been added to the Exchange Management Console for the POP3 and IMAP4 protocols. This administration user interface enables you to configure the following settings for POP3 and IMAP4 for your individual Client Access server:
Port settingsAuthentication settingsConnection settingsMessage and calendar settingsImprovements in Transport Exchange 2007 SP1 includes the following improvements to core transport functionality:
Back pressure algorithm improvementsThe addition of transport configuration options to the Exchange Management ConsoleExchange 2007 SP1 includes the following enhancements to message processing and routing functionality on the Hub Transport server role:
Priority queuingMessage size limits on Active Directory site linksMessage size limits on routing group connectorsThe addition of Send connector configuration options to the Exchange Management ConsoleThe addition of the Windows Rights Management Services (RMS) agent
X.400 authoritative domains
Transport rules are now able to act on Unified Messaging messages
Exchange 2007 SP1 includes the following enhancements to the Edge Transport server role:
Improvements to the following EdgeSync cmdlets: Start-EdgeSynchronization cmdletTest-EdgeSynchronization cmdletImprovements to the cloned configuration scriptsMailbox Server Role Improvements Exchange 2007 SP1 introduces several new features for the Mailbox server role including the following:
Public folder management by using the Exchange Management ConsoleNew public folder featuresMailbox management improvementsAbility to import and export mailbox by using .pst filesChanges to Messaging Records Management (MRM)
New performance monitor counters for online database defragmentation
High Availability Exchange 2007 SP1 introduces several new features for high availability, in addition to improvements to existing high availability features. The new and improved features extend the scenarios in which you can achieve data and service availability for your Exchange 2007 server roles. The new scenarios enable organizations to separate high availability scenarios from site resilience scenarios, and to deploy configurations that are customized for the specific needs of your organization in each separate area.The following new features for high availability and improvements to existing high availability features are available in Exchange 2007 SP1:
Standby continuous replicationSupport for Windows Server 2008 Support for multi-subnet failover clustersSupport for Dynamic Host Configuration Protocol (DHCP) IPv4Support for IPv6New quorum models (disk and file share witness)Continuous replication (log shipping and seeding) over redundant cluster networks in a cluster continuous replication environmentReporting and monitoring improvementsPerformance improvementsTransport dumpster improvementsExchange Management Console improvements
Unified Messaging Server Role Improvements Unified Messaging has been improved and has added new features in Exchange 2007 SP1. To use some of these features, you must correctly deploy Microsoft Office Communications Server 2007 in your environment.To correctly plan and deploy Exchange 2007 SP1 and Communications Server 2007 in your Unified Messaging environment, you must follow the planning and deployment steps that are provided in the Office Communications Server and Client Documentation Rollup.The following is a summary of the Unified Messaging features that are available in an integrated Exchange 2007 SP1 and Communications Server 2007 environment:
Ability to create SIP URI and E.164 dial plans by using the New Dial Plan wizardAdditional logic for resolving internal calling numberNotification of forwarding when leaving voice messages in scenarios where the destination uses call forwardingSupport for recording high-fidelity voice messages in Exchange Unified MessagingAccess to Outlook Voice Access from Microsoft Office Communicator 2007 without requiring the user to enter a PIN
Ability for Office Communicator 2007 clients to associate subjects and priorities to voice messages
Support for media streams to traverse firewalls
Integration of missed call notification e-mail messages with Office Communicator 2007
Ability to prohibit Play on Phone calls that are placed by using Office Communicator 2007 from being subjected to call forwarding rules that are configured
The following features are available in Exchange 2007 SP1 without integrating your Unified Messaging environment together with Communications Server 2007:
Support for Secure Realtime Transport Protocol (SRTP).Exchange Management Console support for configuring Mutual Transport Layer Security (mutual TLS) for dial plans.Ability to add a SIP or E.164 address for a user by using the Enable Unified Messaging Wizard.Ability to modify extension numbers and SIP and E.164 addresses for a UM-enabled user by using the Exchange Management Console.In-band fax tone detection. By default, this feature is disabled but can be enabled in environments that use IP PBXs.
Quality of Service (QoS) support.
Development Improvements Exchange 2007 SP1 introduces several enhancements to the Exchange API set. The most significant of those changes are to the Exchange Web Services.
Exchange Web Services Exchange 2007 SP1 introduces the following new functionality and improvements to the Exchange Web Services API. The following list identifies functionality now available in Exchange 2007 SP1:
Support for public folder access. Public folders can now be created, deleted, edited, and synchronized by using the Exchange Web Services.Improved delegate access.Delegate management.Item identifier translation between identifier formats.Folder level permissions.
Proxy to the best Client Access server.