ACF2 Password History change to retain the last x passwords

Products

• ACF2

Issue/Introduction

How to change the password history in ACF2 to retain the last x number of passwords and if there is any maximum limit?

 

Environment

Release : 16.0

Component : ACF2 for z/OS

Resolution

The password history can be changed by adding PSWXHIST PSWXHST#(nn) as shown below for retaining last 24 passwords as an example:

SET C(GSO)
CHANGE PSWD PSWXHIST PSWXHST#(24)
F ACF2,REFRESH(PSWD)
LIST PSWD

The max value for PSWXHST# is 64.

Note that there are performance considerations to keep in mind when increasing password history in conjunction with using AES256 encrypted passwords. It is not recommended to go beyond PSWXHST#(10) when AES256 encryption is enabled.