With z/OS 2.2, there is a new option for TSO available, PASSWORDPREPROMPT={ON|OFF} with OFF being the default.
When activating that option you need to enter userid and password together in one screen. Then you are informed if the provided is valid or not. If not, you are logged out of the session.
So you will not see the old Logon screen after entering the userid alone:
------------------------------- TSO/E LOGON -----------------------------
Enter LOGON parameters below: RACF LOGON parameters:
Userid ===> xxxxxxx
Password ===> New Password ===>
Procedure ===> pppppppp Group Ident ===>
Acct Nmbr ===> nnnnnnnn
Size ===> 2048
Perform ===>
Command ===>
Enter an 'S' before each option desired below:
-Nomail -Nonotice -Reconnect -OIDcard
-------------------------------------------------------------------------
For TPX this new Option has the consequence that you need to check your logon ACL script for TSO. It likely need to be changed doe to the changed data flow between terminal and TSO. A good approach is to logon to TSO without the ACL being active (Use line command 'g' instead of 's' in the Main Menu) and trace all input from the terminal and all panels received from TSO; finally rewrite the ACL.