User unable to Authenicate to AD after password change [Random]

Hi,

Some users in our environment has issue logging in to domain resource after changing password.

If Administrator update the password using ADUC, back to the original password they were using. Problem resolved.

I looked at our Domain Controller, there was no AD replication issues. The only issue I found was Memory leak of MMC on our PDC. (Win2k8R2).

I transfer all the Domain roles (PDC, RID and Infrastructure) to another DC and restart the server. Problem still exist to some users.

I am not sure where to look at next... Any idea?

Thanks