Error message when you complete a certificate request in Internet Information Services 7.0: "Cannot find the certificate request associated with this certificate file"

In Microsoft Internet Information Services (IIS) 7.0, you use the Complete Certificate Request feature to complete a certificate request. When you try to finish processing the certificate, you receive the following error message:

This issue occurs when you try to complete a certificate request that involves a Distinguished Encoding Rules (DER)-encoded certificate and not a Base64-encoded certificate.

To resolve this issue, make sure that you select a Base64-encoded certificate when you create the initial certificate request.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.