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android device registration for phone signin

testuser7 271 Reputation points
2024-03-14T18:46:27.2+00:00

My understanding is, I can register my android phone with more than one Azure-AD tenants through MS-authenticator app. As we know, for phone-signin "device registration" is mandatory.

This way, I can do phone-signin with my two account in two tenant.

However, I could not enroll my android phone for "phone signin" as device did not register in second AAD-tenant.

I thought after iOS, now Android platform is also allowed to be registered in multiple AAD tenants.

Any help ?

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  1. Crystal-MSFT 44,416 Reputation points Microsoft Vendor
    2024-03-15T01:35:46.1566667+00:00

    @testuser7, Thanks for posting in Q&A. Based as I know, it is not possible to register an Android device with multiple Azure AD tenants for phone sign-in using Microsoft Authenticator. The Authenticator app requires device registration, and a device can only be registered with a single tenant. Therefore, it is not possible to use the same device for phone sign-in with two different tenants.

    https://learn.microsoft.com/en-us/windows-server/identity/ad-fs/operations/walkthrough--workplace-join-to-an-android-device#join-your-device-with-workplace-join

    Thanks for your understanding.

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  2. testuser7 271 Reputation points
    2024-03-18T11:37:57.2833333+00:00

    @Crystal-MSFT @Shweta Mathur Not fully resolved. Yes, I understand that we can not do Phone-signin with multiple tenants on Android.However, if we take out phone-signin, can we just register android phone with more than one tenants ?? I believe we can because I have read on MS doc that this is now possible.