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Why do i get asked for the MFA code on the computer Microsoft Outlook App

Melissa Perron 1 Reputation point
2022-10-13T13:28:02.677+00:00

We've had MFA enabled for quite some time for our users. We used to have to enter the app passwords the computer app and when logging in from a web browser the MFA code.

As of yesterday we need to enter the MFA code on the app but the MFA code does not work.

Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
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  1. Vasil Michev 100.2K Reputation points MVP
    2022-10-13T16:16:24.603+00:00

    Microsoft recently started blocking basic authentication, which also makes app passwords unusable. This doesn't necessarily mean that you need to provide MFA code, unless such is required by your admin. Work with your IT staff to get some clarity on this and to properly configure your devices as needed. You can refer them to this blog post: https://techcommunity.microsoft.com/t5/exchange-team-blog/exchange-online-email-applications-stopped-signing-in-or-keep/ba-p/3641943

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  2. Givary-MSFT 30,931 Reputation points Microsoft Employee
    2022-10-14T04:20:47.633+00:00

    @Melissa Perron Thank you for reaching out to us. As @Vasil Michev mentioned above, The deprecation of basic authentication will also prevent the use of app passwords with apps that don't support two-step verification.

    Same has been documented here: https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-basic-authentication-exchange-online#:~:text=The%20deprecation%20of%20basic%20authentication%20will%20also%20prevent%20the%20use%20of%20app%20passwords%20with%20apps%20that%20don%27t%20support%20two%2Dstep%20verification.

    Let me know if you have any further questions.

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