When prompting has completed and the logon processor has processed the LOGON command, the logon post-prompt exit, IKJEFLD3, receives control. Using IKJEFLD3, you can:

• Examine and modify the JCL statements built by logon processing
• Reference or update various TSO/E control blocks after they are built
• Provide additional JCL statements
• Terminate the logon process.

For more information, see Writing a logon post-prompt exit (IKJEFLD3).