My environment is a private cloud using Amazon Web Services VPC, we have about 20 servers that are joined to a domain controller.
from time to time, I encounter the error "An authentication error has occured, The local security authority cannot be contacted" when attempting to login using domain user account.
This error occurs at random time to random member servers, sometimes user A encounter the error, but user B can login fine, while both user A and user B are in the same OU and same security group in the domain.
Many times, we can only rejoin these machines to the domain, but in the long run that is not a viable solution, as it would affect the production environment.
Any ideas on why this happen? I can understand if all users can't login, but strange enough is, certain users can, while certain users can't.
PS/ all these machines are having the same SIDs, except the domain controller, because we deploy them based on an AMI which was created earlier, and we didn't sysprep after that.