Before you begin, backup your existing OpenSSO Enterprise WAR file and configuration data:
Copy your existing OpenSSO Enterprise WAR file to a safe location. Then, if you need to back out Update 1 for some reason, you can re-deploy your backup copy of the WAR file.
Backup your configuration data, as described in Chapter 15, Backing Up and Restoring Configuration Data, in Sun OpenSSO Enterprise 8.0 Administration Guide.