How to get the Microsoft Data team to reset my MFA?

Hi @CY Ong,

Can you confirm whether you are the only admin in the tenant and have lost access due to Error Code 399287?

If so, I would recommend contacting Microsoft Support by phone so the frontline support team can create a support case and route it to the Data Protection Team (DPT). You can find the correct phone number for your region here: Contact Microsoft customer support

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

(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 regions, the initial interaction may be automated, so here’s a general idea of how the conversation might go to help you prepare:       

What kind of problem are you experiencing?          

Answer: Authenticator          

What products do you use?          

Answer: Office 365 for business          

Is this for an education or company account?          

Answer: For companies          

Are you an administrator?          

Answer: Yes          

Are there any other administrators in your organization?          

Answer: No. I am the only admin in my tenant           

Do you need a... Service request?           

Answer: Yes. I need to create a ticket. Please send me direct to the Data Protection Teams.       

During the phone call, you will need to provide the information associated with your subscription, such as your company name, billing details, phone number, and an alternate email address, etc. This information allows the Data Protection team to verify your identity and securely assist you in regaining access to your administrator account.     

Once access has been restored, you may want to consider registering the Microsoft Authenticator app as an MFA method or using a different phone number if appropriate. This can sometimes help avoid similar verification issues in the future.

I hope this information helps you move forward, and I sincerely hope you're able to regain access to your tenant as quickly as possible.