Email and Two-Factor Support Info

Important Tips for Email After signing up for Two-Factor Authentication

After you add 2FA protection to your email, you may be prompted to sign in again, this is expected, simply sign in as you normally do, and look for the notification on your device to complete sign in.

*The Outlook mail app is the officially supported app for phones and tablets. You can call the Help Center at 402-472-3970 with any problems that occur.

If you have issues with with your iphone or Apple computer mail app following being enrolled for DUO please see the instructions at the bottom of the page.

Device Requirements

Supported Software for Computers:
  • Windows: Microsoft Office 2016, 2019, or Office 365
    • NOT Supported: Office 2010, 2013
  • Mac:  Microsoft Office 2016, 2019, or Office 365
    • NOT Supported: Office 2011

Other Software for Computers:

  • Apple Mail (can work) - requires macOS X 10.14 or higher. Mail on 10.13 or below will not work with DUO.  *Microsoft and ITS do not provide support for Apple Mail.
Software that will not work following 2FA:
  • Gmail Application - Will no longer work with your UNL Exchange email after 2FA is required
  • Thunderbird - Does not currently support Modern Authentication (OAuth with SMTP).
  • MailSpring - Does not currently support Modern Authentication (OAuth with SMTP).
Supported Applications for Phones and Tablets:
  • The Outlook application downloaded from your phone manufacturers app store.
*Android: Use the MS Outlook app. Minimum Android version: Android 7.0 or higher.
*Apple Mail requires iOS 11.x+ to run. This is the iPhone 5s, 6, and higher and will work with Two-Factor but is not officially supported by Microsoft.

To install office 365 including outlook

  • The required version of Microsoft Outlook is Office 2016 or higher.  If it is an earlier version, you'll need an upgrade.
    • If your device is provided to you by your department please work with your tech or email for support.
  • For personal computers, you can install the newest version of Office 365. 
    • Once you've signed in and approved the DUO notification, the "Install Office" button appears at top right of your screen. Click it to start the install of the entire Office 365 suite. 

Apple Device Troubleshooting


The Apple iOS/iPhone Mail app may send you into a cycle of trying to sign in. If it will not accept your password several times, try this:
  • Have your iPhone running at iOS version 11 or higher
  • Go to settings, and scroll down to 'Passwords & Accounts'
  • Select your UNL/UNO/UNK email account and choose 'Delete Account' at the bottom
  • When it takes you back to the 'Passwords & Accounts' screen, choose 'Add Account'
  • Choose the 'Microsoft Exchange' option and fill in your email account information
  • When you get to the sign in page, sign in like you normally do and be sure to look for the notification from the Duo app to approve the log in.

Apple Computer

 If you use Apple's on Mac desktops and laptops, you may experience a similar inability to sign back in. The fix is the same as on the iPhone/iPad: remove your NU 'Exchange' account, and add it back.
  • In Apple Mail, go to the menu item "Mail > Accounts...".  
  • Select the "Exchange" account on the left, and click the minus sign '–' at bottom of the list to delete it.
  • To add the account back, select "Exchange" and enter your NU email address to sign in. 
  • Look for the DUO notification on your DUO device to approve the login. Your email messages, calendar and contacts will re-download.
In October, 2020, Microsoft will be making security changes which will remove support for Basic Authentication with SMTP. If you're not using Microsoft Outlook, check with the vendor of your email client on support for Microsoft's Modern Authentication (OAuth).