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Before You Start Using Two-Step Login with Office 365

This article applies to: Two-Step Login


How It Works

You can add the extra security of Two-Step Login to your Office 365 account. This is an optional feature, so you can turn it off again if you need to.

When you use Two-Step Login with Office 365, it protects access to your email, calendar, and all other Office 365 services.

Adding Two-Step Login will not change how often you need to sign in to Office 365. You will just need to complete the second step of logging in after the regular sign-in window appears.

Two-Step Login for Office 365 is completely independent of opting in to expanded use of Two-Step Login with all services that use CUWebLogin.  If you are subject to mandated use of Two-Step Login with CUWebLogin, that requirement will not extend to Office 365.

  • When you Opt In to Two-Step Login, it will apply to all Office 365 applications on all your devices, including your computer, Outlook on the Web, and all your mobile devices where you use Office 365.
  • Before you start using Two-Step Login with Apple's Mail and Calendar apps in iOS 11 and later, you need to update your cornell.edu account profile.
  • If you are switching to Microsoft Outlook for iOS or Android from some other mobile app for email or calendar, you will need to disable that software before opting in.

Compatible Applications

Two-Step Login for Office 365 works with:

  • Outlook and other Microsoft Office applications on:
    • Windows
    • macOS
    • iOS
    • Android
  • Apple’s Mail and Calendar apps in:
    • MacOS 10.14 (Mojave) and later
    • iOS 11 and later
  • Outlook on the Web (outlook.cornell.edu)

Do not select this option if you ever use any other software for accessing your email, calendar, or other Office 365 services. Once you opt in, only the products listed above will work.

On Windows and macOS you need to be running Office 2016 or later. If you are using Office 2013 for Windows, please contact your local IT support about updating it to work with Two-Step Login, or upgrade to Office 2016.
Once you have applied Two-Step Login to Office 365, you will no longer be able to access your Office 365 email account using the IMAP or POP protocols, and SMTP will not work for sending messages. This only applies if you set up Office 365 to use the IMAP or POP protocols.

The only way to access an Exchange Group Account (EGA) on a mobile device will be via Outlook on the Web in a browser.

Next: Opt In to Two-Step Login for Office 365

About this Article

Last updated: 

Thursday, September 5, 2019 - 10:43am

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