On the login screen, click Forgot Password. You will be sent an email to reset your password.
If you registered for a webinar, you received an email confirmation with the password you selected when you registered. If you are attempting to login to a webinar you did NOT register for, you will not have a password.
To retrieve your password if you did register, click the Forgot Password on the webinar login screen. You will be sent a copy of your original Registration Confirmation email which contains the password you chose when you registered.