To perform this procedure, the account you use must be delegated the Exchange Organization Administrator role. For more information about permissions, delegating roles, and the rights that are required to administer Exchange 2007, see Permission Considerations.

Before installing the Exchange management tools, you must first install the necessary prerequisites for Exchange 2007. For detailed steps to install the necessary prerequisites, see Exchange 2007 System Requirements and How to Install Exchange 2007 SP1 Prerequisites on Windows Server 2008 or Windows Vista.

Also, before you perform this procedure, be aware of the following:

• If the computer on which you install the Exchange management tools has a 64-bit processor and 64-bit operating system, you must install the 64-bit version of the management tools. If the computer on which you install the Exchange management tools has a 32-bit processor and 32-bit operating system, you must install the 32-bit version of the management tools. To download the 64-bit version of the management tools, use the same media or download that you use to install Exchange 2007. For 32-bit download information, see Microsoft Exchange Server 2007 Management Tools (32-Bit).
  
• The following table lists the supported operating systems for installing only the Exchange management tools.
  

  Supported operating systems for Exchange management tools

  Exchange version	Supported operating systems
  Release to manufacturing (RTM) version of Exchange 2007, 32-bit processor	Windows Server 2003 SP1, Standard Edition or Enterprise Edition Windows Server 2003 R2, Standard Edition or Enterprise Edition Windows XP SP2
  Exchange 2007 RTM, 64-bit processor	Windows XP x64 Edition Any operating system that is supported for Exchange 2007 original release
  Exchange 2007 Service Pack 1 (SP1), 32-bit processor	Windows Vista Windows Server 2008, Standard or Enterprise Edition Windows Server 2003 SP2, Standard Edition or Enterprise Edition Windows Server 2003 R2 with SP2, Standard Edition or Enterprise Edition Windows XP SP2
  Exchange 2007 SP1, 64-bit processor	Windows Vista Windows Server 2008, 64-bit edition Windows XP x64 Edition Any operating system that is supported for Exchange 2007 SP1

• If you install Exchange 2007 or earlier (or the associated management tools) on the same computer that is running Outlook 2007 and the user's mailbox is enabled for Unified Messaging (UM), you cannot use the Voice Mail tab in Outlook 2007 to configure voice mail options. The voice mail options on this tab will be dimmed. However, you can use Outlook Web Access to configure voice mail options.
  To resolve this issue, perform the following steps:
  
  1. Uninstall Microsoft Exchange or any Microsoft Exchange management tools.
     
  2. In Registry Editor, locate the following registry subkey:
     HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Messaging Subsystem\MSMapiApps
     

     Caution:
     Incorrectly editing the registry can cause serious problems that may require you to reinstall your operating system. Problems resulting from editing the registry incorrectly may not be able to be resolved. Before editing the registry, back up any valuable data.

  3. Delete the following values:
     String: EMSMDB32.DLL
     String: EMSABP32.DLL
     
  4. Reinstall Outlook 2007 on the server.
     

  Note:
  Installing Exchange 2007 or earlier (or the associated management tools) on a computer that is running Outlook 2007 or earlier is unsupported. For more information, see Microsoft Knowledge Base article 266418, Microsoft does not support installing Exchange Server components and Outlook on the same computer.

  For more information about supported operating systems, see Exchange 2007 System Requirements.
  

For more information about Exchange 2007 platform versions, see Exchange Server 2007: Platforms, Editions, and Versions.