Usually this is either because you have not enrolled a phone or because you have an unsupported email client.
If you have not enrolled a phone, select the "Enroll" bubble for your application above and follow the instructions.
Only the following email clients are supported:
- Outlook 2016 for Windows and Mac
- Outlook App for iOS and Android
- OWA (https://365.ucdavis.edu) browser based email for any device.
No other email clients are supported. The following are examples of unsupported email clients:
- Outlook 2010, 2011, 2013
- Mac Mail
- Apple Mail on mac and iOS
Note: Unsupported email clients will work within an HS facility, or using VPN.
For more information, you can visit the "Guides" Bubble or Verify your email client will work with Duo.
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