404. That’s an error.

The requested URL /_/+1/confirm?hl=en&url=http://www.isaca.org/ecommerce/Pages/Login.aspx?ReturnUrl=%2F_layouts%2FAuthenticate.aspx%3FSource%3D%252FPages%252FGlossary.aspx%253Ftid%253D1517%2526char%253DI&Source=%2FPages%2FGlossary.aspx%3Ftid%3D1517%26char%3DI was not found on this server. That’s all we know.