If you're having issues resetting your Motion Array password from your Account page, please make sure it meets these requirements:
A total of 8-50 characters
At least one lower case character
At least one upper case character
At least one number
If you have forgot your password and need a reminder sent to your email, follow this link.
UPDATE: If you are receiving an 'Unauthenticated.' error message when trying to reset your password, please follow the steps in this article: Why Can't I Sign Into My Account? (Unauthenticated or Endless Loop)