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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 provides an additional layer of authentication to your email and Office 365 data.

This requirement is 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 does not necessarily extend to Office 365.

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

No, once you opt in or are required to use it, 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).
Some other apps, like Gmail for Android or Thunderbird, may continue to work when carefully configured by an experienced user, but we encourage people to switch to a supported client. For more details, review Before You Start Using Two-Step Login with Office 365.

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.

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