Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear TT96,
Greeting. Thank you for posting to Microsoft Community.
I understand your concerns and sincerely apologize for the inconvenience this may cause. Yes, as you think, MFA can be reset, but this requires there is other admins in your organization to set it up, knowing that you are the only user of organization, so, for this case you may need to contact our data protection team.
Please understand that account issues usually involve information security (phone numbers, payment methods, etc.), are very sensitive, and should not be discussed in public forums accessible to all Microsoft customers. We value your organization's security and privacy, so we sincerely recommend that you contact our technical support directly, they will manually verify your account for you.
Find Microsoft 365 for business support phone numbers by country or region - Microsoft 365 admin | Microsoft Learn
Our Data Protection Team will ensure that your organizations data is secure and will remail private.
In addition, for your proposal - "There should be a big statement during setup that the Authenticator backup will be useless if you're the only (admin) user", please forgive me for taking the liberty of raising a new piece of feedback for you on Community (microsoft.com), which is Microsoft's webpage dedicated to collecting customer feedback on products. I will invite my team to vote on it, and users who want the same will join the vote and comment when they see it, so that it will appear at the top of the page, which makes it easier to quickly submit feedback to the product group. Your suggestions help us to provide better service to you and other users. We highly value each customer's feedback on our products.
Reset organization Multi factor · Community (microsoft.com)
Microsoft product team will adjust the page design based on user feedback. Hopefully this will be included in future product updates.
Your understanding and cooperation are greatly appreciated, and if there is anything else that can be done for you, please feel free to reply.
Have a good day.
Best regards,
Winter| Microsoft Community Moderator