Outlook Mobile App

Is there a way to integrate DUO with the Microsoft Outlook Mobile App?

I see how to integrate it with OWA.

Duo’s solutions for Microsoft mail integrate at the service level, not at the client. If you’re using Microsoft 365 (Exchange Online) and federate it with an identity provider that works with Duo then the Outlook mobile app will perform a passive web sign-in to EXO and show the Duo 2FA prompt.

If you are still using on-premises Exchange, Duo’s OWA integration won’t show the 2FA prompt to the mobile app because it excludes ActiveSync endpoints. If you set up Exchange for Hybrid Modern Authentication there is an opportunity to integrate Duo as part of that deployment’s federation.

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a way to integrate DUO with the Microsoft Outlook Mobile App

Sign up for a Duo account. Log in to the Duo Admin Panel and navigate to Applications. Click Protect an Application and locate the entry for Microsoft OWA in the applications list. Click Protect to the far-right to configure the application and get your integration key, secret key, and API hostname.