Dear Support Team, I need urgent support regarding Microsoft Authenticator, please help!

Question

Dear Support Team,

I am [Moderator note: personal info removed] and currently using an account, namely [Moderator note: personal info removed]@datacenterkhanhhoa.onmicrosoft.com at work.

Unfortunately, my phone which has Microsoft Authenticator app to login this account, has been stolen. And, I have no way to login this account now.

Could you please let me know what steps should be taken to login back to this account [Moderator note: personal info removed]@datacenterkhanhhoa.onmicrosoft.com without using my phone?

This is work account and it is urgent.

Your consideration to this matter would be much appreciated.

Best regards,

[Moderator note: personal info removed] 

Answer 1

Hi @Vinh Phan,   

Thank you for posting your question in the Microsoft Q&A forum.      

I’m really sorry to hear about your situation. I understand you’re unable to log in to your account. To assist you effectively, I’d like to clarify a few points:    

Could you please clarify whether you are an end user or an admin?           

Do you have any other admin account that you can use to log in to Microsoft 365 Admin center?    

If you are an end user I would recommend you contact your account's Admin to reset your MFA settings through the Microsoft Entra Admin Center. Ask your administrator to follow these steps:    

1. Sign in to Microsoft Entra admin center with the admin account 
2. Go to Users 
3. Select the affected user account 
4. Open Authentication methods 
5. Revoke sessions 
6. Select Require re‑register MFA 
7. Save the changes               

Revoke MFA sessions and require re-register in the Microsoft Entra admin center                  

If you don't have any other admin account in this situation, the Microsoft Data Protection team has tools and processes in place to verify identity and regain access to administrator accounts.    

Please note that forum moderators have no control over user accounts, especially when it comes to logging in to your account, resetting your password, changing your access, etc.    

Therefore, If 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 let them raise a ticket for you: Customer service phone numbers - Microsoft Support 

*(Important Note: Depending on your country or region, when you call the support number, you may hear an introduction of about 30 seconds such as "you can visit the link...". You can ignore this introduction and wait until you are presented with the options. Then press "1" as a business email user, and again "1" for technical help.)     

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.    

Answer: Authenticator.    

A: What products do you use?    

B: Office 365 for business.    

Verification: Education or company account?    

B: For companies    

A: Are you an administrator?    

B: Yes.    

A: Are there any other administrators in your organization?    

B: No.    

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

B: Yes    

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.    

Alternatively, you can try set up a new trial tenant and submit your support request:   

1. Visit the Microsoft 365 Enterprise Plans page: Go to Compare Office 365 Enterprise Pricing and Plans | Microsoft 365.   
2. Choose a plan and start a free trial: Select any of the available plans and click "Try for free" to begin the trial setup process.   
3. Follow the guided setup: Complete the steps to create a new Microsoft account and a new tenant. This will be a separate and independent Microsoft 365 environment.   
4. Access the Microsoft 365 Admin Center: Once the new tenant is created, navigate to https://admin.microsoft.com/.   
5. Go to Support: In the left-hand navigation menu, click on "Support" and then "Help & support."   
6. Raise a support ticket: Describe your issue in detail. Crucially, you must clearly state that you are locked out of a different, pre-existing Microsoft 365 tenant where you are the administrator. Provide the following information about your locked account:    
   • Your administrator account email address for the locked tenant.   
   • The domain name of your locked tenant    
   • Any error messages you are receiving.   
   • Details about the authentication issues you are experiencing.   
   • Confirmation that you are the administrator of the locked tenant.   
7. Submit your ticket: Follow the prompts to submit your support request. You will likely receive a ticket number for tracking.   

When you open a support ticket, please make sure to turn off the Support Assistant (AI) in the help panel.  

Several customers have reported issues when the Support Assistant is turned on  the system sometimes fails to display the “Contact Support” option.  

As shown in the screenshot, simply switch Support Assistant > Off, then type your issue description.  Once the AI is off, the “Contact Support” button will appear normally, allowing you to submit a ticket directly.  

Important notes:    

• This new trial tenant will not give you access to any of the data or settings in your original locked tenant. It is solely a temporary means to contact Microsoft support.   
• Be prepared for Microsoft support to ask for verification of your identity and administrative rights for the locked tenant.   
• The resolution time might be longer as you are contacting support from a different tenant.   
• Remember to cancel the trial subscription for the new tenant once your issue with the original account is resolved to avoid any unintended charges. You can typically do this within the Microsoft 365 Admin Center under "Billing" -> "Your products."   

I hope these steps will help resolve your issue. If you need further assistance, we are always here to help.     

Thank you again for your time and understanding. While my initial response may not resolve the issue immediately, I’d like to gather more details about your situation so I can assist you more effectively.    

I really appreciate your patience, and I’m here to help. Looking forward to your response.   

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Answer 2

For a stolen phone with Microsoft Authenticator on a work account, the only supported options are:

1. Sign in using a different verification method
   • On the sign-in screen for ******@datacenterkhanhhoa.onmicrosoft.com, when prompted for Microsoft Authenticator, look for options such as Use a different verification option (for example SMS, email, or another registered method) and complete sign-in that way.
2. Ask the organization’s IT/Help desk to reset MFA
   • For work or school accounts, the tenant administrator or Help desk can clear the existing two-step verification settings for the account.
   • After they clear the settings, the next time signing in, the system will prompt to register Microsoft Authenticator (or another method) again on the new phone.
   • This is the standard path when a device with Authenticator is lost or stolen.
3. If this account is the only admin on the tenant
   • If ******@datacenterkhanhhoa.onmicrosoft.com is the sole administrator and no one else can reset MFA, contact Microsoft support and ask for the Data Protection team to help reset the authentication methods for the tenant admin account.
   • Use the regional phone numbers listed under Customer service phone numbers - Microsoft Support and clearly state that this is a work/organization account, that this user is the administrator, and that access to Microsoft Authenticator was lost due to a stolen phone.

Until MFA is reset or an alternate method is used, support agents cannot send verification codes or directly change security info for the account.

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References:

• Work or school account help
• Common problems with two-step verification for a work or school account
• I need a phone number for Microsoft support - Microsoft Q&A
• I have a Micrsoft business account and I am the admin and the only user registered under this account. I can't log in because i have replaced my phone and the authenticator doesn't work. - Microsoft Q&A
• Requesting a Tenant Admin MFA Reset - Microsoft Q&A
• Microsoft Authenticator app doesn't show 6-digit OTP code - Microsoft Q&A