ACF2 PSWD GSO record value must be set to prohibit password reuse for a minimum of five generations or more.

Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to consecutively reuse their password when that password has exceeded its defined lifetime, the end result is a password that is not changed as per policy requirements.

From an ACF command screen enter: SET CONTROL(GSO) LIST PSWD

If "PSWDXHIST" is not specified, this is a finding.

If "PSWDXHIST#" is set to "5" or greater, this is not a finding.

Configure Password option "PSWXHST" is coded and "PSWXHST#" is "5" or greater.