The Exchange Server 2007 installation fails during the PrepareSchema step, and you receive an error message in the Setup log

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SYMPTOMS

When you try to install Microsoft Exchange Server 2007, the Exchange 2007 setup process fails during the PrepareSchema step. Additionally, you receive the following error message in the Setup log:

Microsoft.Exchange.Data.Directory.SystemConfiguration.ResourceBookingConfig'
could not be found on <Domain_Controller_Name>.

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CAUSE

This problem occurs because the Resource Schema object under Global Settings in Active Directory directory service is missing.

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RESOLUTION

To resolve this problem, manually create the Resource Schema object. To do this, follow these steps:

Click Start, click Run, type adsiedit.msc, and then press ENTER.
Locate the following location:
CN=Global Settings, CN=<Organization Name>, CN=Microsoft Exchange, CN=Services, CN=Configuration, DC=<Domain>, DC=<suffix>
Right-click CN=Global Settings, click New Object and then click Next.
Click to select the msExchangeResourceSchema class in the text box, and then click Next.
In the Value field, type Resource Schema.

Note This operation creates the Resource Schema object.
Right-click the Resource Schema object, click Properties, and then click msExchVersion.
Set the value of the msExchVersion attribute to 4535486012416.