Yale University Information Technology Services (ITS) recommends everyone have at least two options set up for multifactor authentication (MFA); there is no limit to the number of eligible devices you may add to your MFA account. MFA lets you link multiple devices to your account, so you can use your mobile phone, a landline, and a hardware token. You have the option to define which device is the default and to rename devices.

See Multifactor Authentication (MFA-DUO): Enrolling and managing devices for instructions on enrolling devices.

To obtain bypass codes, please contact the ITS Help Desk at 203-432-9000. 

• You may request up to 10 codes.
• These codes:
  • Can be used as an alternative DUO authentication method.
  • Each code only be used once. 
  • Each code has no expiration.