publickey authentication getting failed in rhel

I have 2 RHEL machines . I am attempting to login via ssh with publickeyauthentication from 1 machine (say Machine A) to the other (say machine B) both of which are in the same network. For that first i created a .ssh folder in the home directory of an account which happens to be a domain account. Then i created a file "authorized_keys" wher i added the public key generated in the machine B. I gave appropriate permissions to the ".ssh" folder ( 700 ) and the "authorized_keys" file (600). I also made necessary changes in the /etc/ssh/sshd_config file and restarted sshd service . When i tried to login from machine B via ssh it is still prompting for password. My /etc/pam.d/sshd file looks like below

`
#### Google OS Login control. Do not edit this section. ####
auth       [default=ignore] pam_group.so
#### End Google OS Login control section. ####
#%PAM-1.0
auth       substack     password-auth
auth       include      postlogin
account    required     pam_sepermit.so
account    required     pam_nologin.so
account    include      password-auth
password   include      password-auth
# pam_selinux.so close should be the first session rule
session    required     pam_selinux.so close
session    required     pam_loginuid.so
# pam_selinux.so open should only be followed by sessions to be executed in the user context
session    required     pam_selinux.so open env_params
session    required     pam_namespace.so
session    optional     pam_keyinit.so force revoke
session    optional     pam_motd.so
session    include      password-auth
session    include      postlogin

` and the password-auth file in /etc/pam.d/ looks like below

`# This file is used for both password-auth and system-auth and is statically managed by Salt

auth        required                                     pam_env.so
auth        required                                     pam_faildelay.so delay=2000000
auth        [default=1 ignore=ignore success=ok]         pam_usertype.so isregular
auth        [default=1 ignore=ignore success=ok]         pam_localuser.so
auth        sufficient                                   pam_unix.so nullok try_first_pass
auth        [default=1 ignore=ignore success=ok]         pam_usertype.so isregular
auth        sufficient                                   pam_sss.so forward_pass
auth        required                                     pam_deny.so

account     [success=2 default=ignore]                   pam_succeed_if.so service in su:su-l:sudo:sudo-i:login:systemd-user:crond quiet
account     [success=1 default=ignore]                   pam_oslogin_login.so
account     substack                                     gmi-policy
account     required                                     pam_unix.so
account     sufficient                                   pam_localuser.so
account     sufficient                                   pam_usertype.so issystem
account     [default=bad success=ok user_unknown=ignore] pam_sss.so quiet
account     required                                     pam_permit.so

password    requisite                                    pam_pwquality.so try_first_pass local_users_only
password    sufficient                                   pam_unix.so sha512 shadow nullok try_first_pass use_authtok
password    sufficient                                   pam_sss.so use_authtok
password    required                                     pam_deny.so

session     optional                                     pam_keyinit.so revoke
session     required                                     pam_limits.so
-session    optional                                     pam_systemd.so
session     optional                                     pam_oddjob_mkhomedir.so
session     [success=1 default=ignore]                   pam_succeed_if.so service in crond quiet use_uid
session     required                                     pam_unix.so
session     optional                                     pam_sss.so

` Can someone plz tell me where in the configuration do i have to make changes for successful ssh publickeyauthentication?