Dear @Lucie & Jamy,
Good day! Welcome to Q&A forum!
Please understand that our forum is a public platform, and we will modify your question to cover your organization domain name in the description. Please notice to hide these personal or organization information next time you post error or some information to protect personal data.
First of all, I sincerely apologize for the inconvenience caused by this issue.
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.
Please note that forum moderators have no control over user accounts, especially when it comes to logging in to your account, resetting your password, changing your access, etc.
Therefore, if you are the only administrator in your organization, then you need to involve Microsoft data protection team. 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 (Scroll down for Business users)
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
(Note: Sometimes, you would hear the computer-generated voice at first, please kindly wait for it to end, and if an agent is available, you would be directed to them and get your support)
As an alternative, you can create a new tenant account and submit your request from there.
To set up a new tenant, please follow these steps:
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 the loss of MFA access. I’m the only 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 once your issue is resolved to avoid any unintended charges.
Once you're able to regain access your admin account, I strongly recommend doing these to avoid future lockouts:
- Set up backup MFA methods (e.g., alternate phone, email)
- Consider creating a break-glass admin account that bypasses MFA for emergencies
You can configure backup MFA options in the Microsoft Entra Admin Center (formerly Azure AD).
To set up backup MFA methods, please proceed with the following steps:
- Go to Microsoft Entra Admin Center
- Navigate to: Identity > Users > All users and select your admin account
- Open Authentication methods
- Here you can:
- Add alternate phone numbers
- Add backup email addresses
- Require re-registration of MFA to reset and add new methods
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Kindly let me know when there are updates or if you need further assistance. Any updates you’re able to share would be really helpful. I appreciate your time and look forward to hearing how things are going!
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