You can install Exchange 2007 SP1 on a computer that is running the Windows Server 2008 operating system. For more information about the installation prerequisites for installing Exchange 2007 SP1 on a Windows Server 2008 computer, see How to Install Exchange 2007 SP1 and SP2 Prerequisites on Windows Server 2008 or Windows Vista. For more information about the supported operating systems for Exchange 2007 SP1, see Exchange 2007 System Requirements.

If Exchange 2007 SP1 is deployed on a computer that is running Windows Server 2008, you can enter IP addresses and IP address ranges in the Internet Protocol version 4 (IPv4) format, Internet Protocol version 6 (IPv6) format, or both formats. A default installation of Windows Server 2008 enables support for IPv4 and IPv6. If Exchange 2007 SP1 is deployed in this configuration, all server roles can send data to and receive data from devices, servers, and clients that use IPv6 addresses. For more information about Exchange 2007 SP1 support for IPv6 addresses, see IPv6 Support in Exchange 2007 SP1 and SP2.

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 ActiveSync

Outlook Web Access

POP3/IMAP4

Exchange 2007 SP1 includes the following improvements to core transport functionality:

• Back pressure algorithm improvements
  
  
• The addition of transport configuration options to the Exchange Management Console
  
  

Exchange 2007 SP1 includes the following enhancements to message processing and routing functionality on the Hub Transport server role:

• Priority queuing
  
  
• Message size limits on Active Directory site links
  
  
• Message size limits on routing group connectors
  
  
• The addition of Send connector configuration options to the Exchange Management Console
  
  
• The 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 cmdlet
    
    
  • Test-EdgeSynchronization cmdlet
    
    
• Improvements to the cloned configuration scripts
  
  

For more information about improvements to the Transport server roles in Exchange 2007 SP1, see New Transport Features in Exchange 2007 SP1.

Exchange 2007 SP1 introduces several new features for the Mailbox server role including the following:

• Public folder management by using the Exchange Management Console
  
  
• New public folder features
  
  
• Mailbox management improvements
  
  
• Ability to import and export mailbox by using .pst files
  
  
• Changes to Messaging Records Management (MRM)
  
  
• New performance monitor counters for online database defragmentation
  
  

For more information about the Mailbox server role improvements in Exchange 2007 SP1, see New Mailbox Features in Exchange 2007 SP1.

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 replication
  
  
• Support for Windows Server 2008
  
  
  • Support for multi-subnet failover clusters
    
    
  • Support for Dynamic Host Configuration Protocol (DHCP) IPv4
    
    
  • Support for IPv6
    
    
  • New quorum models (disk and file share witness)
    
    
• Continuous replication (log shipping and seeding) over redundant cluster networks in a cluster continuous replication environment
  
  
• Reporting and monitoring improvements
  
  
• Performance improvements
  
  
• Transport dumpster improvements
  
  
• Exchange Management Console improvements
  
  

For more information about the high availability features in Exchange 2007 SP1, see New High Availability Features in Exchange 2007 SP1.

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 wizard
  
  
• Additional logic for resolving internal calling number
  
  
• Notification of forwarding when leaving voice messages in scenarios where the destination uses call forwarding
  
  
• Support for recording high-fidelity voice messages in Exchange Unified Messaging
  
  
• Access 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.
  
  
• For more information about each of these features in Unified Messaging and Exchange 2007 SP1, see New Unified Messaging Features in Exchange 2007 SP1.
  
  

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

For more information about each server role that is included in Exchange 2007, see the following topics:

• Client Access Server Role: Overview
  
  
• Edge Transport Server Role: Overview
  
  
• Hub Transport Server Role: Overview
  
  
• Mailbox Server Role: Overview
  
  
• Unified Messaging Server Role: Overview