Phone number blocked from receiving calls or SMS for login

Question

Good day!
At my company are suscribed for Microsoft 365 Business where I have a separate account for the admin center. I lost the 2FA for that account and I have no other admin account to manage this.

Could someone please assist in resetting/removing MFA on my account. My phone number is blocked with error 399287.

Kind regards,

[Moderator note: personal info removed]

Answer 1

Dear @Gabriella Szvacsek, 

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

I’m sorry to hear you’re having trouble accessing your work account. Please know that you’re not alone, as many users encounter similar challenges. I am here to guide you through each step so you can regain access and return to work as quickly as possible. 

As part of the community support team, my access is limited and I cannot make changes to administrator-level settings. For security reasons, only Microsoft’s specialized support team has the necessary tools and permissions to assist with account-level issues such as MFA resets or advanced troubleshooting. 

Since you are the sole Global Administrator for the tenant, please follow the steps below to complete the account recovery process and regain access. 

Option 1: Contact Microsoft Data Protection Support by Phone (Primary Method)   

To regain access to your admin account as you can't access the Admin Portal, you can try reaching out to our Global Customer Service phone to raise a request for resetting your authentication method here: Customer service phone numbers - Microsoft Support. During the call, request to speak to an agent, and share with them every detail related to your query and also mention that you are the only admin lost access to your account. This should allow you to contact the appropriate team so you can solve this incident as soon as possible.  

Here are some tips and an example of a prompt to help you navigate the IVR more effectively:        

In some countries, it is an automated conversation like:  

IVR: What kind of problem are you concerned about?        

You: Authenticator.        

IVR: What kind of product do you use?        

You: Office 365 for business.        

IVR confirmation: education or company account?        

You: For companies        

IVR: Are you an administrator?        

You: Yes.        

IVR: Do you have another administrator in your organization?        

You: No.        

Option 2: Create a Temporary Account (Trial Tenant) to Submit a Support Ticket (Alternative Method)  

If you still cannot reach to a live agent, there is still a workaround, you might consider registering for a new tenant by signing up for a trial subscription via this link Microsoft 365 Business Plans and Pricing | Microsoft 365. This would allow you to create a new tenant following the prompts provided. Once set up, you can access the admin console of the new tenant and submit a support ticket requesting to speak with the Data Protection team on behalf of your previous tenant.        

Follow the guided setup process to create a new account for a new tenant.   

Once your tenant is created, you should be able to access the support portal and submit your ticket referencing your locked account without further issues 

In your ticket description, you'll need to clearly explain that you're trying to regain access to your previous Microsoft 365 tenant and need help from the Data Protection team. Here's a message you can use or adapt:   

"Hello, I’m currently unable to access my previous Microsoft 365 tenant due to losing MFA access, which prevents me from receiving verification codes. I’m the global admin, but I’m locked out and unable to generate a QR code or bypass MFA.   

I created this new tenant solely to request assistance. I kindly ask to be connected with the Data Protection team to verify my identity and help me recover access to the original tenant.   

This is urgent, as I rely on Microsoft 365 for my work and have been unable to operate for several days. I’m available to provide any documentation or verification needed to support the recovery process."   

Ticket Support: In the Microsoft 365 Admin Center > Support > Help & Support. You can raise support ticket at https://admin.microsoft.com/#/support/requests      

•  Please remember to cancel the trial subscription after your issue is resolved, as this will help you avoid any accidental billing. You may prefer the following resource for detailed instructions: Cancel your Microsoft business subscription in the Microsoft 365 admin center | Microsoft Learn 

Please note that forum moderators do not have access to user account settings and cannot assist with logging in, resetting passwords, or changing access rights. While we do not have access to internal systems or administrative tools required to resolve account-specific or backend-related issues but we’ll continue doing our best to support you within the scope of our responsibilities.   

I hope this helps you regain access to your account quickly. I'm glad to assist and truly hope the information provided has been useful. Please feel free to reach out anytime if you are still unable to reach a live agent after following the steps above.   

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