On AIX in /var/log/messages you are seeing messages such as the following after installing QAS:
"auth|security:debug sshd: PAM: pam_acct_mgmt: error User password has expired"
The password is not expired. This occurs for local and Unix enabled users.
The issue occurs when any non-AIX LAM module is referenced in /etc/methods.cfg
IBM has recognized this as an issue on their end and they are working on fix.