admin account log out

Question

Hi,

I cannot sign in to my Admin account after I accidentally deleted my account from the Microsoft authenticator app a while ago so I cannot generate login code there.

I also cannot sign in with code from the mobile number as that method has also been blocked:

Error Code: 399287

Request Id: [Moderator note: personal information removed]

Correlation Id: [Moderator note: personal information removed]

Timestamp: 2026-03-01T07:42:45Z

I don't have an alternate admin account!

Moved from: Microsoft 365 and Office | Access | For business | Windows

Answer 1

Dear @Miklós Sterbinszky,

Welcome to Microsoft Q&A. 

I’m very sorry that you’re facing this situation. From what you described, this issue occurred because the account was removed from the Microsoft Authenticator app while MFA was still required. At the same time, the phone/SMS verification method is blocked (error code 399287), which means Microsoft can no longer use that phone number to complete verification. When both the Authenticator app and SMS methods are unavailable, the sign-in process cannot be completed.

Normally, if your tenant has another Global Administrator, you could contact them and ask them to reset your MFA methods or require re‑registration. This would allow you to sign in again and set up Microsoft Authenticator on a new device.

However, you mentioned that there is no other administrator available in your tenant. I’m very sorry about that, this puts you in a tenant lockout scenario, where self‑recovery is no longer possible.

Once you regain access, I strongly recommend creating at least one additional Global Admin account and registering multiple MFA methods (for example, Microsoft Authenticator plus a backup method). This helps prevent the same situation from happening again in the future.

Please also note that this forum is a user-to-user support space. Forum moderators do not have access to user accounts and are unable to reset passwords, change authentication methods, or intervene in sign-in issues.

Given your current situation, the only supported way forward is to contact Microsoft Support and request assistance from the Microsoft Data Protection/Account Recovery team. They are the only team authorized to verify ownership and reset MFA for a locked admin account. When contacting them, make sure to provide the Request ID, Correlation ID, and Timestamp you shared, as these help them locate the sign‑in failure quickly.

Please try to find the related hotline number to call the frontline let them raise a ticket for you: Customer service phone numbers - Microsoft Support 

In some countries, this is an automated conversation: First, when you call the hotline, they will ask you what kind of problem you are struggling with. 

Answer: Authenticator. 

A: What products do you use? 

B: Office 365 for business. 

Verification: Education or company account? 

B: For companies 

A: Are you an administrator? 

B: Yes. 

A: Are there any other administrators in your organization? 

B: No. 

A: I need one.... Service request? 

B: Yes 

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

 

If you still cannot reach to agent, there is still a workaround, you might consider registering for a new tenant by signing up for a trial subscription via this link Compare All Microsoft 365 Plans | Microsoft. This would allow you to create a new tenant following the provided prompts. 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.  

Please remember to cancel the trial subscription once your issue is resolved to avoid any unintended charges.  

I understand that this entire process can feel long and complicated, and I truly appreciate your patience while working through it. These steps are in place to protect the security of your account, so I hope you can understand why they are required. I sincerely hope you’ll be able to regain access to your account soon. If you need help at any point, or if you have any questions during the process, please feel free to reach out, I’m always here and happy to assist.  

Thank you again for your understanding and patience. 

Kind regards,

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