Active Directory domain is in mixed mode

Situation: The client tries to install Exhcange 2007 on a Windows 2003 x64. He receive this "[ERROR] Active Directory domain 'DC=chicagotech.DC=net' is in mixed mode". To install Exchange Server 2007, the domain functional level must be raised to Windows 2000 native mode or above.

Troubleshooting: Based on Microsoft, Exchange Server 2007 setup won't continue ifan existing Active Directory domain is not set to Windows 2000 Server native mode or better.

To resolve this issue, follow link to raise the domain functional level to at least the Windows 2000 Server native level, and then rerun Exchange 2007 setup.

How to raise the domain functional level

http://www.howtonetworking.com/server/ad&dc.htm

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Active Directory domain is in mixed mode
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