Hi cJoseph,
Thanks for your reply.
We didn't change any settings in the clearpass and few domain user encounter this reject status.
Our appliance is using ClearPass version: 6.2.1.55992. we see this few times when we checked that this user/machine is being rejected . but after 3 to 5 min we notice that it will be accepted again.
I can't find any services being restarted in the Event viewer similar with the windbind error (Radius service service is restarted).
Thanks