Main menu 'Securityinformation' will show you registered devices for your current organization.While I'm still struggeling to revalidate my account, I think I found a solution for the AAD B2C problem: I just realized that what worked for me, ist the the solution Alfredo R already posted! So I can confirm that this works. This account authentication is required when I switch from Azure primary directory to Azure AD B2C directory in Azure portal. I can’t finish my Authenticator app migration. So I can’t get the QR code of the account for Authenticator app. But I still don’t know where this special account details stored. From the name, it may relate to my Azure login account a work or school account). The name of the account in Authenticator app is It is not a work or school account. It was created by Azure when I created Azure AD B2C directory. Now my issue for this migration is Azure AD B2C account. I have rescanned all QR codes of work or school accounts that I created. As work or school accounts, the migration process requires Additional Security Verification, which requires to rescan all QR codes of all accounts in Authenticator app. I backed up and recovered account details to new phone. I used Back and Recover function of Authenticator app. When I changed my phone, Authenticator app must be migrated to my new phone. With Multi-Factor Authentication enabled Azure portal, it requires users to approve every login in users’ Authenticator App.

Microsoft authenticator new phone