Duo + Office 365 Authentication


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Which Office 365 applications require Duo?

*NOTEApple Mail will NOT work with Duo if you're running an older version of macOS, such as High Sierra (10.3). Please use Outlook on the Web (https://outlook.com/uci.edu) or you can download your free copy of Microsoft Office and use Outlook for the Mac. See the Microsoft 365 page on the OIT website.

Apple officially supports/provides security patches for the current OS version (macOS 11 Big Sur) plus the previous two, so our recommendation is that you upgrade to at least macOS 10.14 (Mojave). Your system could be vulnerable to attacks that are fixed in newer releases, and your system could be compromised and used to attack other systems. In addition, there are bug fixes and security updates to the Apple Mail client that necessitate it being updated to fix problems other users are having and to prevent security issues with older clients.

If you're running an older version than the ones mentioned above, please update your operating system. Faculty and staff should partner with their local IT support, and students should reach out to AntTech for assistance.

We understand that upgrading your OS can be time-consuming, so in the meantime, we recommend using OWA or Outlook for the Mac, as previously mentioned.

The OITHD cannot assist with OS upgrades, and we cannot implement any changes to the network to get your email to work on an older machine. We apologize for the inconvenience.

Do I have to use Duo every time I check my email?

No. The vast majority of our clients check their email using the Outlook desktop client or Apple Mail which doesn't require you to enter your password when you open them; therefore, you don't need to use Duo everyday.

You will have to use Duo each day if you check your email via Outlook on the Web (aka OWA) at https://outlook.com/uci.edu.

Similarly, you'll only have to use Duo with Office 365 if: