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Transition from Resource Forest to Resource Forest

[This is pre-release documentation and subject to change in future releases. This topic's current status is: Writing.]

Applies to: Exchange Server 2010 Beta Topic Last Modified: 2008-12-05

This topic explains how to deploy Exchange 2010 in an existing Exchange Server 2003 or Exchange 2007 resource forest.

Before you begin, confirm the following:

  • You have planned your Exchange 2010 messaging system. For more information about planning an Exchange 2010 messaging system, see Planning and Deployment.
  • You have an existing Exchange 2003 or Exchange 2000 resource forest topology.

To deploy Exchange 2007 in an existing Exchange resource forest
  1. Install Exchange 2010 on a new server in the existing Exchange resource forest. For more information about how to install Exchange 2007, see one of the following topics:

    • Perform a Typical Exchange 2010 Installation
    • Perform a Custom Exchange 2010 Installation
    • Install Exchange 2010 in Unattended Mode

    If you do not install the Mailbox, Hub Transport, Client Access, and Unified Messaging server roles on a single computer, you should install the Exchange 2010 server roles on separate computers in the following order:

    • Client Access server role
    • Hub Transport server role
    • Mailbox server role
    • Unified Messaging server role

    In addition, an Exchange 2007 Mailbox server cannot send or receive messages unless a Hub Transport server also exists in its Active Directory site. Therefore, when upgrading an existing Exchange organization, we recommend that you install the Client Access and Hub Transport server roles before installing the Mailbox server role. If you install the Mailbox server first, you will not have client access or mail flow to or from the Mailbox server until you install the Client Access and Hub Transport server roles.

    If you plan to have an Edge Transport server in your Exchange 2010 organization, you must install the Edge Transport server role on a separate computer.

  2. Move existing mailboxes on the Exchange 2007 servers to the new Exchange 2000 server.

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