I have lost my microsoft authenticator app phone

Revell, Andrew 0 Reputation points

I can sign in to my work office account, but when I navigate to my account, and then update security information, I am prompted with a microsoft authenticator response. I have since lost the microsoft authenticator phone. My work have their own onelogin MFA setup which has been reset successfully, but I am still prompted with this microsoft authenticator prompt which I can only imagine is going to the old phone.

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Microsoft Authenticator
Microsoft Authenticator
A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation.
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  1. JimmySalian-2011 42,066 Reputation points


    It seems the MFA will require a reset for your account within the Tesco AD tenant, you will need to contact your sys admin to get it reset so you can reconfigure to the new phone.

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  2. Rafael da Rocha 5,091 Reputation points

    Hello Andrew,

    your administrator can reset your MFA enrollment on Microsoft 365, so that on your next login you would register your new Authenticator.

    Here's the reference documentation:


    If this or any other reply helped solve your question, please remember to upvote and/or "Accept Answer".

    It helps others facing similar issues find the solution.

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