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Upgrading a Project Server is Data Migration

Upgrading from a previous version of Project Server is a data migration process. In the traditional sense, upgrading from a previous version is often thought of as an "in place" process in which the application's binaries and data are upgraded from the previous version to a newer version. For example, upgrading from Project Server 2002 to Project Server 2003 was an "in place" process. In contrast, upgrading to Office Project Server 2007 is a data migration process. In this process, Office Project Server 2007 is installed first (on the same computer as the previous version of Project Server or on a different one). Then data from the previous version is migrated. There is no actual upgrade of the binaries. The administrator then has the choice of running both versions concurrently or removing the older version.
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