After you have migrated your applications, you need to migrate your instance configurations.
See Migration prerequisites to determine the currently installed product level of WebSphere Application Server Version 3.5.
Migrate from a WebSphere Application Server Version 3.5.6 (or later) instance
This topic contains detailed information and step-by-step instructions for migrating a WebSphere Application Server Version 3.5.6 (or later) instance to a new WebSphere Application Server - Express instance.Migrate from a WebSphere Application Server - Express Version 5.0.x instance
This topic contains detailed information and step-by-step instructions for migrating a WebSphere Application Server - Express Version 5 instance to a new WebSphere Application Server - Express Version 5.1 instance.