I had another busniess account and i was lost access to authenticator app and not able to login

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Hello @Venkata Chakka,

I’m really sorry to hear about the experience you’ve been going through. I completely understand how frustrating it can be to run into this kind of issue, especially when it impacts your access.

To help move this forward, the next step would be to contact the Data Protection Team directly so they can assist with the escalation. You can reach them by following the steps below:

1. Find the related hotline number to call the frontline and let them raise a ticket for you (Expand region under Business Users): 

Customer service phone numbers - Microsoft Support 

2. 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: Microsoft 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   

If your subscription is from a partner or reseller, contact the reseller's support provider to help open a service request on behalf of you instead.   

I’d like to clarify that as a forum moderator, I do not have access to user sign-in logs, cannot reset MFA, revoke access, or contact Microsoft Support/Data Protection Team on your behalf. Please consider me an end user as well, providing guidance based on experience and documented processes. 

That said, I’m happy to support you throughout the process. Once you’ve created the support request and received a ticket number, feel free to share it with me via private message. I can help you track the case and suggest next steps if needed.

To access the private message, please refresh this page, you should see a pop-up at the top of your thread. Click on View message to review it.

If you encounter any difficulties in contacting the frontline support, please feel free to let me know. Thank you and I wish you a great day!  

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Hello @Venkata Chakka,

Thank you for replying here and in our private message. I’m sorry to hear that you’re having difficulty reaching the Support Team through the frontline support channels.

Please note that I’m not able to contact you directly via phone or email. Also, since this is a public platform, I recommend avoiding sharing any personal information here. For your safety and privacy, I will remove the information you’ve provided.

If you still have trouble using the frontline support, you can try set up a new trial tenant and submit your support request:    

• Visit the Microsoft 365 Enterprise Plans page: Go to Compare Office 365 Enterprise Pricing and Plans | Microsoft 365.
• 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.     

• 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.    
• Access the Microsoft 365 Admin Center: Once the new tenant is created, navigate to https://admin.microsoft.com/.    
• Go to Support:   
  • Click on "Help & Support" button like this image. 
  
  • Toggle Support Assistant option to OFF > Type your issue under "How can we help?" Box > click Get Help. 
  • The Contact Support button will become available, you can click on it now. 
  
  • Choose contact method: "Phone" or "Email"      
  
• 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:      
  • The domain name of your locked tenant     
  • Your administrator account. 
  • Any error messages you are receiving.    
  • Details about the authentication issues you are experiencing.    
  • Your proof of ownership. 
  
• Finally, clicking on "Contact me".   

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 you'll be able to reach the Data Protection team this way. If you still have any issue, please don't hesitate to reply. Thank you for your understanding and cooperation so far!

this is a tenant recovery case (Data Protection escalation required)

https://support.microsoft.com/contactus

Or

https://admin.microsoft.com/Adminportal/Home#/support

Even if you can’t sign in, there is an option: Sign in another way” --> “Get help signing in OR Contact support without login.

Try out: https://mysignins.microsoft.com/security-info & Re-register MFA.