Delay using sudo with sssd

Issue

• using sssd for user authentication against AD
• experiencing significant delays the first time invoking commands with sudo when password prompt occurs

[testuser@rhel6 ~]$ time sudo service rhnsd restart
[sudo] password for testuser:
Stopping Red Hat Network Daemon:                           [  OK  ]
Starting Red Hat Network Daemon:                           [  OK  ]

real    0m32.363s
user    0m0.049s
sys     0m0.106s