Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi @Ayman Saleh,
Good day, and I appreciate the clear explanation of your concern.
Based on the error details you provided (Error Code: 399287), the issue is most likely occurring during the identity verification stage of sign-in, rather than being a direct Volume Licensing permission issue. This error is commonly associated with Multi-Factor Authentication (MFA), particularly when SMS or phone verification is blocked by Microsoft’s security and phone reputation controls.
When this happens, the sign-in process cannot be completed successfully, which in turn prevents access to the Volume Licensing portal even if the account itself has the correct licensing role assigned.
To move toward a resolution, I suggest the following steps:
1/ Contact other IT admins
- If you're an admin, please check to see if there are other IT admins in your organization who can help you with the reset MFA for your account and you can share the steps outlined in the article Manage user authentication methods for Microsoft Entra multifactor authentication. This will help them assist you in resetting your MFA settings and restoring access to your account.
Once your IT admin has reset your MFA, the next time you log in to your account, you will be guided through the process of setting up the Microsoft Authenticator app again from the beginning by scanning a QR code. This will break the loop and allow you to access your account normally.
2/ Contact Microsoft Data Protection Support by phone
- If you're the only admin, in this situation, the Microsoft Data Protection Team has tools and processes in place to verify identity and regain access to administrator accounts. 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.
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.
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.)
IVR: What kind of problem are you concerned about? You: Authenticator.
A: What products do you use? You: Office 365 for business.
Verification: Education or company account? You: For companies
IVR: Are you an administrator? You: Yes.
IVR: Are there any other administrators in your organization? You: No.
IVR: Do you need a... Service request? You: Yes. I need to create a ticket. Please send me directly to the Data Protection Team.
3/ Create a new tenant to submit a support ticket
If you cannot reach a live agent, there is still a workaround, you might consider registering for a new tenant by signing up for a trial subscription and submit your request from there.
To set up a new tenant, please follow these steps below:
Visit 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 unable to access our Microsoft 365 tenant and Volume Licensing information due to an identity verification issue during sign-in. The process fails with Error Code 399287, which prevents me from completing multi-factor authentication and accessing the admin portal.
I am the administrator for this tenant and would appreciate assistance from the Microsoft Support or Data Protection team to verify my identity and restore access.
This issue is urgent as it impacts our ability to manage licenses for business operations. I’m available to provide any required verification or documentation."
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
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 need further assistance.
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Thank you for your kindness and contributions to the forum.
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