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Duo adds an additional layer of security when you sign in to a TU system by requiring the use of a second device such as a smartphone or landline. There are various ways to authenticate using Duo, such as the Duo App, Security Keys, or Passcodes.

This knowledge base article covers how to log in with Single Sign-on and how Faculty and Staff will use Duo for multi-factor authentication at login.

To comply with U.S. regulations, Duo blocks authentications from users whose IP address originates in a country or region subject to economic and trade sanctions enforced by the U.S. Office of Foreign Assets Control.