WebSphere Application Server - Express uses two i5/OS user profiles by default:
The QEJB user profile is is shipped as part of the i5/OS operating system. This user profile is used only when accessing validation list objects used for storing the encoded passwords used with WebSphere Application Server - Express. For more information on using validation list objects to store encoded passwords, see Password encoding
The QEJBSVR user profile is created on your iSeries when you install WebSphere Application Server - Express. This profile is the default profile under which all application servers run. Directories and files used by WebSphere Application Server - Express are normally owned by user profile QEJBSVR. The WebSphere Application Server - Express runtime, administration tools, and Qshell scripts sets the ownership and authorities correctly on any objects created. If you create objects manually outside of the WebSphere Application Server - Express tools, or if you modify the authorities on objects used by WebSphere Application Server - Express, you must ensure QEJBSVR has the correct authorities to these objects.
When you create new directories for WebSphere Application Server - Express, the QEJBSVR user profile must have read and execute authorities (*RX) to those directories.
Note: If you have specified another user profile to run your application servers, it is recommended that you specify QEJBSVR for its group profile. See Run under a different profile for more information.