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Office 365 and Two-Step Login

Frequently Asked Questions (FAQ) about Two-Step Login for Office 365

This article applies to: Two-Step Login


How Will Two-Step Login Work with Office 365?

Two-Step Login for Office 365 is a voluntary (opt-in) service that you can enable at the Manage Your Two-Step Login site.

This is completely independent of opting in to Two-Step Login for 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.

Can I Choose which Office 365 Applications Use Two-Step Login?

No, once you opt in, Two-Step Login will be required for all Office 365 applications.

Which Clients Can I Use with Office 365 and Two-Step Login?

 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).
    If you opt in to Two-Step Login for Office 365, you will not be able to use any other clients for accessing Office 365 services.

Can I Use Two-Step Login for Office 365 on the Web Only?

No. Limiting Two-Step Login to Office 365 on the web would allow an attacker to bypass Two-Step Login's extra protection simply by using a desktop or mobile client instead of web access.

Two-Step Login for More ADFS Applications

My area has an application that uses ADFS for login. Will my customers who opt in to use Two-Step Login with Office 365 also need to use it with my site? Will this be an option?

Two-Step Login will only apply to Office 365 and not any other service using ADFS. Other applications or websites integrated with the ADFS sign-in page will not be affected. CIT has not determined whether, or when, to extend Two-Step Login to other services using ADFS.

About this Article

Last updated: 

Wednesday, June 19, 2019 - 1:53pm

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