Unable to login as AD user on RHEL6 system after Joining the system to AD domain

Following errors are seen when AD user tries to ssh from a remote system:

Jun 24 11:00:55 hostname1 sshd[2859]: pam_winbind(sshd:auth): user 'KT+user1' granted access
Jun 24 11:00:55 hostname1 sshd[2859]: pam_krb5[2859]: account checks fail for 'KT+user1': unknown reason -1765328316 (Realm not local to KDC)
Jun 24 11:00:55 hostname1 sshd[2859]: pam_winbind(sshd:account): user 'KT+user1' granted access
Jun 24 11:00:55 hostname1 sshd[2860]: fatal: Access denied for user KT+user1 by PAM account configuration
Jun 24 11:00:55 hostname1 sshd[2859]: Failed password for KT+user1 from x.x.x.x port 1118 ssh2
Jun 24 11:01:16 hostname1 sshd[2877]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser=