You can only migrate a Commerce Server 2007 site to Commerce Server 2009.

Before migrating to Commerce Server 2009, you must understand the changes to site resources, site data, and site code that are required to convert from an earlier version of Commerce Server.

This section starts with a question-and-answer section that addresses frequently asked migration questions and highlights various aspects of migration. This section also provides detailed information about migrating an ASP.NET site and what schema differences exist between Commerce Server 2007 and Commerce Server 2009.