I can't access my microsoft school or work account on microsoft authenticator app

Question

I accidently uninstalled authenticator app from my mobile and when I reinstalled it then now I can't sign in to that app because that authenticator app is asking for authentication from the authenticator app and which I don't have anymore, and when I select for can't use authenticator app then it shows two options either approve request from authenticator app or enter the code from authenticator app, nothing else. And I can't link any phone number or different mail id, because for that also it is requesting approve from authenticator app which I don't have at the moment, so please help me with this, I even visited the help center in my organization but they are saying they don't know about that. please help me with this.

Answer 1

I accidently uninstalled authenticator app

This breaks the secure link.

You'll need the school / work admins to reset the account so a new QR code can be generated with which you can relink the authentication device to your account.

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Answer 2

@Mahendra Singh

Thank you for posting this in Microsoft Q&A.

In this situation there is no option where you can reset your MFA by your own. You will have to contact Azure AD administrator in your organization to get MFA reset for your account.

If you don’t know who are the admins then you can follow below steps to know who are the admin in your tenant. There is a PowerShell way to find global admin in your Azure AD. However, to use PowerShell as well you will have to authenticate yourself first. For authentication again it will prompt for MFA to be completed. 

I would suggest you ask one of your colleague to perform below steps and share the global admin details with you so that you can contact admin and get your MFA registerd.

 

• Open Windows PowerShell as administrator.

• Run command “Install-Module azuread”

• Once installed you can run command “Connect-AzureAD” and enter user credentials once it asks for.

• Once you login, you can run command “Get-AzureADDirectoryRole”.

• From the output you can copy the object ID of Global administrator

• Run command “Get-AzureADDirectoryRoleMember -ObjectId "Paste the object ID of global admin that was copied earlier"

• You will get the list of users with global admin role assigned.

 

Now you can contact any global admin from the list and ask him to perform below steps to reset your MFA so that you can re-register for authenticator app.

 

• Admin has to login to Azure portal and access Azure active directory.

• Once done they have to go to users blade on the left.

• Click on Authentication methods and click on “Require re-register multifactor authentication”.

• Now when you try to login to Azure services it will prompt you to register for MFA again.

 

Let me know if you have any questions.

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