By default, LOGONHERE support for the LOGON command is on; TSO/E users can reconnect to their session even if no disconnection has been detected. LOGONHERE support makes it easier for users to reconnect from a new terminal or after renewing their IP address. To disable this support, follow these steps:

1. Change the LOGONHERE parameter on the LOGON statement in the SYS1.PARMLIB member IKJTSOxx from the default LOGONHERE(ON) to LOGONHERE(OFF).
2. Use the MVS™ SET IKJTSO=xx or TSO/E PARMLIB UPDATE(xx) command to update the system settings.

This deactivates the LOGONHERE support that allows users to reconnect to their session even if no disconnection has been detected. You can use the MVS DISPLAY IKJTSO,LOGON or TSO/E PARMLIB LIST(LOGON) command to check the current settings of the LOGONHERE parameter. For more information about the LOGONHERE parameter, see .