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Hi ARIS RAHMAN

If you are using a work or school account (account provided by your organization) the best option is to contact your organization’s IT support team or administrator. They can reset your MFA settings and help you re‑register your account.

For reference, IT admins can follow the process outlined here: Manage authentication methods for Microsoft Entra multifactor authentication - Microsoft Entra ID |… 

But if you are the only Global Administrator and you are completely locked out of the tenant, you need to request a support ticket to Microsoft support team for help via phone service number: Customer service phone numbers - Microsoft Support. The agent will be able to create a ticket for you under the affected tenant and then transfer this ticket to Data Protection team who could help you to regain access.  

When a call is made to support, the first step is to provide an automated voice response from AI. Be careful, you won't be able to speak to a support representative if you don't respond appropriately here. 

Here's an example of a response that actually led to a support representative. Please refer to it. 

Q. Can you tell me if you are calling as a home user who uses a product or service at home or a business user who uses it in your business to provide the best assistance? 
A.I am a business user. 
Q. Thank you. Can you give me the details of your inquiry? 
A. Login technical support. 
Q. First of all, can you tell me which products you are inquiring about today? 
A. Microsoft 365 business Standard。 
Q. Please wait a moment, I understand Microsoft 365. Are you calling about a new case or an existing one? 
A. New. 
Q. To receive phone support, your phone number must be associated with your Microsoft 365 admin profile. To do this, go to aka.ms/m365profile. Again, it aka.ms/m365profile . This can take 48 hours. In the meantime, you can go to aka.ms/m365profile and file a case online. If you prefer, you can also text the link to the phone number you are calling. What do you think? 
A. The phone number is already linked to the link. 
Q. Can you tell me about the products in your inquiry? 
A. Microsoft 365 Business Standard. 
Q. Are you a Global Administrator? 
A. That's right. 
Q. I'm sorry. I didn't understand. Are you a global administrator for your domain? 
A. Yes, I am a global administrator for the domain. 
Q. If you have any inquiries, you can contact a Microsoft representative. Are you sure? 
A. Yes. Please. 
Q. Yes, I understand. Please wait a moment.

Please note that this team is always overwhelmed, so you might need to wait for them to call you, this should take 3-10 working days. I know that this is not a convenient solution to hear but it seems to be the only way, and it's recommended that you should have a secondary/backup Global Administrator to fix this issue on your own.    

In case the phone line is not supportive, you can consider directly submitting a support request as a helpful workaround:    

• Create a temporary Microsoft 365 tenant using a trial license: Go to Microsoft 365 Business Plans and Pricing and click Try for free to set up a temporary Microsoft 365 tenant with a trial license.    
• Use this new account to sign in to the Microsoft 365 Admin Center and submit a support request on behalf of your primary (locked) account.   
• Click Help & Support > then choose Create a support request.    

Note: This method doesn't require you to use your new account for your business. Instead, it allows you to create a temporary global administrator account so you can submit a support request, as your original global administrator account is locked out due to issues with multi-factor authentication. The trial account is free for one month. Be sure to delete it after submitting your support request to avoid any automatic renewals or charges from Microsoft.     

For further instructions, you can follow this guide: Get support - Microsoft 365 admin | Microsoft Learn.   

If you are using a personal Microsoft account (@outlook.com, @hotmail.com, @live.com...) 

You can try one of the following options: 

• Use the Microsoft Account Recovery Form: Help with the Microsoft account recovery form | Microsoft Support 
• Alternatively, contact Microsoft Support: Go to Contact - Microsoft Support, > type "Support" and click Get Help > click Sign in to contact support at the bottom of the > page under Products & Services, select Microsoft 365 & Office > under Subcategory, select Support > choose Chat with a support agent in your browser 

I hope you understand that we're not Microsoft support, this is a user-to-user support forum. Moderators have no backend access and cannot directly intervene in Microsoft products. We provide only technical guidance and best-practice recommendations based on reported issues.

I hope this information helps and if you have any further questions, please feel free to ask via comment section.

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