When user is trying to login in ESS/MSS/ASS portal are you receiving error "User name or Password is Incorrect"? You must have entered wrong Password. That is only the reason you will see this message.

If you are HR, please follow the article How to change/reset password for employees? to change password for your employees.

If you are an employee and your email is associated with your account you can reset your password on your own. Click here to see how you can do this. If your email is not associated with your account please request your HR to reset your password.