Hi. i have Exchange server 2003 enterprise edition SP2 on my Domain Forest. Exchange mode is : Native mode. Domain functional level is Windows 2003 server mode. Operation system is Wondows 2008 server. I want upgrade Exchange server 2003 to Exchange server 2010 and get error

[strong]Setup /PrepareLegacyExchangePermissions[/strong]

Welcome to Microsoft Exchange Server 2010 Unattended Setup

Setup will continue momentarily, unless you press any key and cancel the installation. By continuing the installation process, you agree to the license terms of Microsoft Exchange Server 2010. If you don't accept these license terms, please cancel the installation. To review the license terms, please go to http://go.microsoft.com/fwlink/?LinkId=150127&clcid=0x409/

Press any key to cancel setup................ No key presses were detected.  Setup will continue. Preparing Exchange Setup

    Copying Setup Files                           COMPLETED

No server roles will be installed

Performing Microsoft Exchange Server Prerequisite Check

    Organization Checks                                       FAILED      The forest functional level of the current Active Directory forest is not W indows Server 2003 native or later. To install Exchange Server 2010, the forest functional level must be at least Windows Server 2003 native.

The Exchange Server setup operation didn't complete. More details can be found in ExchangeSetup.log located in the <SystemDrive>:ExchangeSetupLogs folder.

Exchange Server setup encountered an error.

What may i do?



Software/Hardware used:
esx 4.1