MFA verification problem

Question

I am locked out of my only Global Admin account for tenant [Moderator note: personal info removed].com due to MFA failure. I need MFA reset. No other admin exists. and that error message appeared to me.

Troubleshooting details

If you contact your administrator, send this info to them.

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Error Code: 399287

Request Id: [Moderator note: personal info removed]

Correlation Id:[Moderator note: personal info removed]

Timestamp: 2026-06-02T05:37:22Z

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Answer 1

Please note that Q&A forum is a public platform, and moderators will modify the question to hide personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data.
Hi youssef mohmed
I truly understand how frustrating and inconvenient it can be to lose access to your tenant, especially when encountering error code 399287. 

Please note that we are not Microsoft support, and this is a user-to-user support forum. Moderators and contributors, including external Microsoft employees, do not have backend access and cannot directly intervene in Microsoft products or features. Our role is limited to providing technical guidance and best practice recommendations based on reported issues, requests, or ideas. 

Since you are the sole admin for the tenant, the next step is to contact Microsoft Support directly. In this situation, you’ll need to reach out to the Support team by calling the phone number listed under Customer service phone numbers - Microsoft Support.  

An agent will be able to create a ticket for you under the affected tenant and then escalate this ticket to the Data Protection team, who can assist you in regaining access.   

Please note that an AI system may initially handle your call. I kindly recommend following the prompts carefully so you can be connected to a live support agent. 

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Alternatively, you can set up a Microsoft 365 Business Basic trial, which gives you the ability to submit a support ticket directly through the Microsoft Admin Center   

Step 1: Create a trial business account: 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.    

Step 2: Use this new account to sign in to the Microsoft 365 Admin Center and submit a support request on behalf of the affected tenant 

Step 3: Click Help & Support     

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. The trial account is free for one month. Be sure to cancel it after submitting your support request to avoid any automatic renewals or charges from Microsoft.  You may follow this guide for instructions: Cancel your Microsoft business subscription in the Microsoft 365 admin center | Microsoft Learn.     

I sincerely hope this information provides helpful direction and additional insight.

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