
Good day! Thank you for reaching out to Microsoft Q&A forum and sharing the issue.
Based on the information provided, please check if there are any other administrators in your tenant.
If so, you can request one of them to reset your MFA settings so you can reconfigure them.
If no, you'll need to contact the Microsoft Data Protection team. In this situation, the Microsoft Data Protection team has tools and processes in place to verify identity and regain access to administrator accounts.
Please try to find the related hotline number to call the frontline let them raise a ticket for you: Customer service phone numbers - Microsoft Support
In some countries, this is an automated conversation: First, when you call the hotline, they will ask you what kind of problem you are struggling with.
What kind of problem are you experiencing?
Answer: Authenticator
What products do you use?
Answer: Office 365 for business
Is this for an education or company account?
Answer: For companies
Are you an administrator?
Answer: Yes
Are there any other administrators in your organization?
Answer: No. I am the only admin in my tenant
Do you need a... Service request?
Answer: Yes. I need to create a ticket. Please send me direct to the Data Protection Teams.
- If your organization’s Office 365 Business or Education subscription was acquired through a partner or reseller, and the global administrator is unable to submit a service request directly, please contact the reseller’s support team. They can assist by initiating a service request on your behalf.
- Should you still be unable to reach a support agent, an alternative solution is to register a new tenant by signing up for a trial subscription via this link: Microsoft 365 Business Plans and Pricing | Microsoft 365. This will allow you to create a new tenant by following the setup instructions. Once the tenant is active, you can access its admin console and submit a support ticket requesting to speak with the Data Protection team regarding your original tenant.
Please ensure that the trial subscription is canceled once your issue is resolved to avoid any unintended charges.
If possible, could you please provide me with the case number of your previous support request via private message? Once I receive it, I’ll help check whether your case was routed to the appropriate department. (I’ll initiate the private message after you respond to this answer.)
Please know that I truly appreciate your patience and understanding as we work to support you. If you need any further assistance or clarification, feel free to reach out.
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