Unable to Login as AD or IPA User due to "pam_sss 4 (system error) authentication failure"

Issue

• Users are unable to login AD user from Direct Integration using SSSD
• Similar issues can arise around logging into an Identity Management domain with IPA domain users or AD trust users.
• System Error 4 from pam_sss is visible in the /var/log/secure log for the failed authentication attempts.
• Example of problem below showing SSHD failed auth:

Nov 20 12:34:04 r9-sssd sshd[102095]: pam_sss(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=::1 user=j.doe@test.labs
Nov 20 12:34:04 r9-sssd sshd[102095]: pam_sss(sshd:auth): received for user j.doe@test.labs: 4 (System error)
Nov 20 12:34:06 r9-sssd sshd[102095]: Failed password for j.doe@test.labs from ::1 port 38676 ssh2
Nov 20 12:34:09 r9-sssd sshd[102095]: Connection closed by authenticating user j.doe@test.labs ::1 port 38676 [preauth]