Consider the following conditions when you install Exchange 2007 SP3:

• You can install Exchange 2007 SP3 from the command line or by using the Exchange 2007 Setup wizard.
  
  
• You can use any of the following methods when you install Exchange 2007 SP3:
  
  
  • Run the Setup program in upgrade mode to perform an in-place upgrade to Exchange 2007 SP3.
    
    

    Note:
    If you want to run the Setup program in upgrade mode to perform an in-place upgrade from a beta version of Exchange 2007 SP3, you must first prepare Active Directory and the domains.

  • Perform a clean installation of Exchange 2007 SP3.
    
    
• You must prepare Active Directory and each domain before you perform the first installation of Exchange 2007 SP3 in an organization. This process includes updating the Active Directory schema for Exchange 2007 SP3. For information about the required permissions and about steps that you must follow to complete this process, see How to Prepare Active Directory and Domains in Exchange 2007 SP3 online Help. For a list of Active Directory schema changes that are made when you install Exchange 2007 SP3, see Active Directory Schema Changes (SP3). 
  
  After you prepare Active Directory and each domain, you can install Exchange 2007 SP3 by using an account that has been delegated the Exchange Organization Administrator role.
  
  
• To install or upgrade the first instance of an Exchange 2007 server role in an organization, you must be delegated the Exchange Organization Administrator role. After you install Exchange 2007 SP3 on an Exchange computer that is running this particular role, you can perform later installations or upgrades of Exchange 2007 SP3 servers. To do this, you must use an account that has the Exchange Server Administrator role.
  
  

  Note:
  This permissions requirement does not apply when you are installing the Edge Transport server role or the Exchange 2007 management tools. You can install and upgrade the Edge Transport server role or the management tools by using an account that has local administrator rights on the computer.

• To deploy Exchange 2007 SP3 on an Windows Server 2008-based computer, you must first install Windows Server 2008 on a computer that does not have Exchange installed, and then install Exchange 2007 SP3. We do not support the following procedures:
  
  
  • First upgrading the operating system to Windows Server 2008, and then upgrading Exchange 2007 to Exchange 2007 SP3
    
    
  • First upgrading Exchange 2007 to Exchange 2007 SP3, and then upgrading the operating system to Windows Server 2008 
    
    
• You cannot uninstall Exchange 2007 SP3. After you install Exchange 2007 SP3, the only way that you remove it is to remove Exchange 2007 from the computer, and then reinstall an earlier version of Exchange 2007.
  
  
• The Exchange 2007 Setup program requires that all installation source files are stored on a local resource. This resource can be either a local hard disk or a DVD drive that is connected to the computer. During Setup, if the installation files are detected on a resource that is not local to the computer, the Setup program creates a local copy of the installation files in the temporary files folder, and then deletes the files after Setup is complete. 
  
  A local file source is required because Exchange 2007 Setup is a Microsoft .NET Framework application. This requirement was established to help make sure that all installation files originate from a secure and trusted resource.
  
  Sometimes, the Setup program determines that there is insufficient disk space to continue. When Setup determines disk space requirements, the program includes a buffer space to meet data storage requirements. The buffer space varies, depending on the server role or roles that are to be installed. After Setup is complete, the installation may occupy less space than was requested.
  
  
• You must uninstall all Interim Updates before you install Exchange 2007 SP3.
  
  
• If you use any third-party programs on the computers on which you plan to install Exchange 2007 SP3, we recommend that you contact the program vendors to determine whether any updates are required for the installation of Exchange 2007 SP3. If you plan to install Exchange 2007 SP3 on a Windows Server 2008-based computer, you should also verify application and hardware compatibility with Windows Server 2008.
  
  

  Note:
  Before you install Exchange 2007 SP3, you should stop any third-party applications that are integrated with Exchange.

• If you use Microsoft System Center Operations Manager to monitor Exchange, we recommend that you stop the Health Service before you install Exchange 2007 SP3. If you stop this service, you do not have to restart Exchange 2007 after you install Service Pack 3.
  
  

  Note:
  If Exchange 2007 SP3 is installed automatically by using Microsoft Update, a restart is required.

Consider the following conditions when you upgrade to Exchange 2007 SP3:

• If you install Exchange 2007 SP3 on a computer that is running the RTM version of Exchange 2007, all server roles are upgraded to Exchange 2007 SP3. You cannot choose which server roles you want to upgrade to Exchange 2007 SP3.
  
  
• If you want to add a server role to a computer after you upgrade to Exchange 2007 SP3, you must run the Exchange 2007 SP3 Setup program. This differs from the process that you must follow for earlier versions of Microsoft Exchange. For example, when you add a component to a Microsoft Exchange Server 2003 installation, you must run the Exchange 2003 Setup program to change the installation, and then reapply the service pack.
  
  
• We recommend that you upgrade your servers that are running the Mailbox server role after you upgrade your servers that are running the server roles in the following list. Upgrade your computers in the following order:
  
  
  • Client Access servers
    
    
  • Unified Messaging servers
    
    
  • Hub Transport servers
    
    
  • Edge Transport servers
    
    
  • Mailbox servers
    
    
  If you upgrade your servers in this order, you may avoid potential service interruptions.
  
  
• We recommend that you upgrade Client Access servers that reside on Internet-facing sites before you upgrade Client Access servers that reside on sites that do not have Internet connectivity.
  
  

Consider the following conditions when you upgrade servers that are running the RTM version of Exchange 2007 together with Microsoft Forefront Security for Exchange Server:

• The original release (RTM) version of Forefront Security for Exchange Server is incompatible with Exchange 2007 SP3.
  
  You must either remove Forefront Security for Exchange Server or upgrade it to a later version before you can upgrade to Exchange 2007 SP3. The Exchange 2007 SP3 Setup program does not meet the prerequisites if the computer is running the RTM version of Forefront Security for Exchange Server.
  
  
• If you are running the latest version of Forefront Security for Exchange Server, you must stop all Forefront services before you run the Exchange 2007 SP3 Setup program.
  
  

Consider the following conditions when you install Exchange 2007 SP3 on clustered Mailbox servers.

• Use the same procedure to perform a new installation of Exchange 2007 SP3 that you use for the RTM version of Exchange 2007. For more information, see Planning for Cluster Continuous Replication and Planning for Single Copy Clusters in Exchange 2007 online Help.
  
  
• For information about how to upgrade clustered Mailbox servers, see Upgrading Clustered Mailbox Servers to Exchange 2007 SP1 or SP2 in Exchange 2007 online Help.
  
  

Consider the following conditions when you install Exchange 2007 SP3 on a server that uses Outlook Web Access and if the regional language is set to Spanish:

• If the regional language is set to Spanish when you create a contact in Outlook Web Access, the name fields are mapped as follows:
  
  
  • "Nombre" in Spanish is mapped to “First name” in English and to the underlying storage in Exchange.
    
    
  • "Inicial" in Spanish is mapped to “Middle name” in English and to the underlying storage in Exchange.
    
    
  • "Apellidos" in Spanish is mapped to “Last name” in English and to the underlying storage in Exchange.
    
    
• This is a change from the behavior of Exchange 2007 RTM and of Exchange 2007 SP1. In the earlier versions of Exchange 2007, the name fields are mapped as follows:
  
  
  • "Nombre" in Spanish is mapped to “First name” in English and to the underlying storage in Exchange.
    
    
  • "Primer Apellido" in Spanish is mapped to “Middle name” in English and to the underlying storage in Exchange.
    
    
  • "Segundo Apellido" in Spanish is mapped to “Last name” in English and to the underlying storage in Exchange.
    
    
  For more information about how to troubleshoot issues that may occur because of this change, see Name Mapping in Outlook Web Access Contacts is Reversed After Installing Exchange 2007 SP2 When Regional Language Is Spanish.
  
  

To upgrade a server to Exchange 2007 SP3 by using the graphical user interface, follow these steps:

1. Run Setup.exe from the Exchange 2007 SP3 installation folder. This action starts the Exchange 2007 Setup wizard. The Setup program detects that you want to upgrade the Exchange 2007 installation to a later version of Exchange 2007.
   
   
2. Under Install, click Install Microsoft Exchange Server 2007. Follow the Setup wizard to complete the installation, and accept all default options.
   
   

Note:
You cannot specify which server roles you want to upgrade to Exchange 2007 SP3.

To upgrade a server to Exchange 2007 SP3 from the command line, follow these steps:

1. At a command prompt, connect to the AMD64 or I386 directory of the Exchange 2007 SP3 media location.
   
   
2. Run Setup.com /mode:upgrade. Accept all default options when you perform the steps from the command line.
   
   

You can perform a clean installation of Exchange 2007 SP3 in the same manner that you would install Exchange 2007 RTM or Exchange 2007 SP1. This is because the Exchange 2007 SP3 updates are rolled directly into the file set of the original release version of Exchange 2007. Both the high-level deployment procedures and the specific installation steps are the same. The steps that you must follow depend on the complexity of the Exchange deployment that you want to create.

Exchange 2007 SP3 supports the installation of an update rollup during a new installation ofExchange 2007 SP3. However, Exchange 2007 SP3 does not support the installation of an update rollup during an upgrade installation of Exchange 2007 SP3. For example, Exchange 2007 SP3 does not support installing an update rollup during an upgrade from Exchange 2007 SP2 to Exchange 2007 SP3. For more information, see the "Slipstream Update Rollup Installation" section in How to Install the Latest Service Pack or Update Rollup for Exchange 2007.

Exchange 2007 SP3 is supported on Windows Server 2008 R2. The Exchange Server 2007 SP3 Management Tools are supported on Windows 7. However, Exchange 2007 SP3 provides support only for a new installation of Exchange that is running on these operating systems. Exchange 2007 SP3 is not supported in an upgrade scenario on Windows Server 2008 R2 or on Windows 7. For example, Exchange 2007 SP3 does not support the following installation scenarios:

• Performing a new installation of Exchange 2007 SP3 on a Windows Server 2008 R2-based computer or on a Windows 7-based computer that is upgraded from Windows Server 2008 or from Windows Vista
  
  
• Upgrading Exchange 2007 SP2 to Exchange 2007 SP3 on a Windows Server 2008 R2-based computer or on a Windows 7-based computer that is upgraded from Windows Server 2008 or from Windows Vista 
  
  
• Upgrading the operating system from Windows Server 2008 or from Windows Vista to Windows Server 2008 R2 or to Windows 7 if Exchange 2007 SP3 is installed
  
  
• Performing a slipstream upgrade of Exchange 2007 SP3 on a Windows Server 2003-based computer, on a Windows Server 2008 -based computer, or on a Windows Vista-based computer.