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How to install Exchange 2007 SP1 / Server 2008 in existing Exchange 2003 environment

In this case, we are installing Mailbox, CAS and Hub Transport Roles in one Server.

Prepare Active Directory for Exchange 2007

  1. Make sure Schema master is running Windows Server 2003 SP1 or later
  2. Make sure your Forest functional level and Domain functional level  is at least Windows 2000 Server native
  3. Make sure at least one Global Catalog server is running Windows Server 2003 SP1 or later within the Site.
  4. If you are running RTM version of Exchange 2007, run "setup /PrepareLegacyExchangePermissions" on domains that contain Exchange Servers. Note that Server 2008 only supports Exchange 2007 SP1.
  5. Make sure no Exchange Server 5.5 servers in your Exchange organization
  6. Make sure Exchange 2003 Servers are upgraded to Exchange 2003 SP2

Prepare Physical hardware / OS for Exchange 2007

  1. Make sure the server is a 64-bit processor. In Intel world, it is known as EM64T. Intel Itanium IA64 processors are not supported.
  2. Make sure the server is at least 2GB of ram.
  3. Make sure OS is Server 2008 or Server 2003 x64 Edition
  4. Install .NET Framework Version 2.0 Service Pack 1
  5. Install Windows PowerShell x64
  6. Install Microsoft Management Console (MMC) 3.0
  7. Install IIS, COM+ access, World Wide Web Publishing Service, ASP.NET version 2.0,  but make sure NNTP and SMTP is not installed !
  8. Run Windows Update to install all critical updates.

Install Exchange Server 2007

  1. Run setup.exe from the setup disc.
  2. Click on "Install Microsoft Exchange"
  3. On Installation Type screen, choose "Typical Exchange Server Installation"
  4. This will install all Exchange roles in one server which is the most common installation.