URGENT: MFA Lockout - Lost Authenticator Access and Only Global Admin for Tenant

Hello @Dennis Uhrskov,  

Thank you for posting your valuable question on Microsoft Q&A forum.   

Since you are the only administrator in your organization, then you need to involve Microsoft data protection team. Please try to find the related hotline number to call the frontline and let them raise a ticket for you: Customer service phone numbers - Microsoft Support 

Please carefully follow this instruction to ask for Microsoft Data Protection team support:   

Depending on your country or region. For some countries, when calling the support number, although there are about 30 seconds opening as something "you can visit the link...." But you can ignore this opening and wait until the option, then "1" as a business email user, "1" again for technical help.   

For some countries, it will be an automated conversation like:    

First, when you call the hotline, it asks what kind of problem you are worried about.   

Answered: authenticator.   

A: What kind of product are you using?   

B: Office 365 for business.   

A confirmation: education or company account?   

B: For companies   

A: Are you an administrator?   

B: Yes.   

A: Do you have the other admin in your organization?   

B: No.   

A: You need one.... Service request?   

B: Yes   

Prepare These Before Contacting Support   

• Proof of Purchase: Invoice, order confirmation, or billing history from your Microsoft account.   
• Tenant Domain.  
• Admin Email Address: The one locked out.   
• Date of Last Invoice.  
• Any suspicious activity logs (if applicable).   

If your organization's Office 365 Business/Education subscription is from a partner or reseller, and the global administrator is unable to open a service request on your end, contact the reseller's support provider to help open a service request on behalf of you instead.     

Please note that forum moderators do not have control over user accounts, including actions such as logging in, resetting passwords, or changing access permissions. Therefore, the process to revoke access cannot be handled through the Microsoft Q&A forum.

I hope Data Protection team can successfully revoke your access. If you need any further assistance or need help on this support process, please feel free to reply. I'm here to help!  

Thank you for your kindness and understanding so far!  

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