Information on two-factor authentication, device enrollment, configuration, and troubleshooting.
Overview of adding a new device to Duo
Overview of authentication using the Duo Prompt.
Overview of Duo enrollment
Overview of Duo Mobile on Windows Phone
Overview of Security Keys and Duo
Knowledge base article about software update notifications from Duo
Introduction to two-factor authentication and Duo
Overview of Duo with a Hardware Token
Overview of Duo with Cellphones and Landlines
Duo-protected versus third-party applications. What's the difference?