Receiving pam_unix(sshd:auth): authentication failures, then pam_sss(sshd:auth): authentication success

Issue

• Why are false authentication failure messages reported by pam_unix for SSSD users in Red Hat Enterprise Linux?

• SSH Login to RHEL servers shows pam_unix authentication failure for non-local (IdM/SSSD/AD/LDAP) users

• If an IdM/AD user (sssd) tries to login via ssh first you get pam_unix error then pam_sss success, errors like this are seen in /var/log/secure log :

Oct 22 08:22:12 client1 sshd[3123581]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=client1.example.com  user=user22
Oct 22 08:22:13 client1 sshd[3123581]: pam_sss(sshd:auth): authentication success; logname= uid=0 euid=0 tty=ssh ruser= rhost=client1.example.com user=user22

• How to get rid of pam_unix failed messages when user is in SSSD ?