Installation and Upgrade > Installation and Configuration Guide - Update Existing Installation > Updating an Existing Installation > Preparing Your System for the Update > Configuring the Database Application User Before Updating
  
Configuring the Database Application User Before Updating
If you created a database application user when you installed your Windchill solution, perform the following steps to avoid issues with the automated update process:
From a Windchill shell, execute the following commands to modify Windchill db.properties file with appropriate values:
xconfmanager -s wt.pom.dbUser=<WINDCHILL INSTALL USER NAME> -t "db/db.properties" -p
xconfmanager -s wt.pom.dbPassword=<WINDCHILL INSTALL USER PASSWORD> -t "db/db.properties" -p
xconfmanager -s wt.pom.dbSchemaUser=<WINDCHILL INSTALL USERNAME> -t "db/db.properties" -p
After the update, there will be another required step to reconfigure the database application user in the section titled Configuring the Database Application User After Updating.