Topics Map > University of Chicago > IT Services > Business Systems > Mainframe
Mainframe - Password FAQs
This article explains answers to a set of FAQs regarding mainframe passwords.
Passwords must be at least 6 characters long but cannot exceed 8 characters.
Passwords may be any mix of alphabetic, numeric, and national characters. The "national characters" are “@”, “#” and “$”.
Your Mainframe Password is associated with your 4 character PersonID (the last 4 characters of your 7-character LogonID). You use the same Password to log on to any Project in which that PersonID is enrolled. Changing your Mainframe Password using one of your several enrollments will immediately change your Password for the rest.
Use the “New Password” field on the Logon Screen. Note: that you must use a valid password for your LogonID in the “password” field for this to work. The System will prompt you to re-enter your new password for verification. Please NOTE that changing your Password in the UCHIMVS1 (Production) LPAR will not change your password in the UCHIBETA (Test) LPAR until the following day; changing your password in the UCHIBETA LPAR alone will have no effect in the UCHIMVS1 LPAR and your change will not be saved in UCHIBETA beyond the current day.
Yes, as long as you've remembered your expired password correctly. You will need to enter a new password in the “New Password” field on the Logon Screen to successfully log on.
Your Project Administrator has procedures in place to deal with this problem. (S)He will contact the appropriate IT Services personnel who will assign you a temporary password, one which must be changed the first time it is used. The system will not allow you access unless you change the temporary password during that first Logon.
What is the “forced change interval” for passwords? (How many days can I keep my password before the system forces me to change it?)
Passwords may be kept for 180 days. The system will issue warnings starting 31 days before your password expires.
Is there a waiting period before a newly instituted password can be changed? Must I wait a number of hours or days before changing my new password?
There is no minimum change interval. You may change your password anytime.
The system keeps track of your current and previous 4 passwords and will not allow them to be re-used.
Your LogonID will be locked out of the system after 15 password violations in a single day. The ACF2 “User Violations Counter” is reset to zero after Midnight daily. If you use an incorrect password 3 times while changing your LogonID during a TSO session, your session will be cancelled and you will be returned to the TPX Screen for your original Logon.