Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello @Patson Benard Gamundani
I would like to first clarify that this is a user‑to‑user support forum. Moderators here are not Microsoft Support, so we don’t have backend access or the ability to perform escalations. However, we’re happy to help with troubleshooting guidance and best‑practice recommendations.
Since you are the Global Administrator and are not receiving the MFA verification code by SMS, here are a few things to check:
- Make sure your mobile provider is not blocking or filtering SMS messages.
- Try using another authentication method, such as Microsoft Authenticator or a voice call, if one is available.
- Let me know whether any error message or error code appears during sign-in.
If you still have an active session with access to the Microsoft Entra admin center, you may be able to create another Global Administrator account. An administrator can manage authentication methods for other users, including resetting MFA methods and requiring MFA re-registration. This also applies if there is another administrator account available in the tenant. According to Manage user authentication methods for Microsoft Entra multifactor authentication, administrators can manage authentication methods for other users and require MFA re-registration when necessary. Reference: https://learn.microsoft.com/en-us/entra/identity/authentication/howto-mfa-userdevicesettings#manage-user-authentication-options
If you are the only administrator and are completely locked out of the tenant, the usual options are:
- Contact Microsoft Support directly by phone: Contact Microsoft Office Support
- If calling support does not work, you may consider creating a trial tenant and submitting a support ticket from there on behalf of the affected (locked) tenant. Please remember to cancel the trial subscription afterward to avoid any potential charges. Please note that this process may take longer than usual (around 7-14 business days), as the Data Protection team handles a high volume of requests. As a forum moderator, I don’t have access to Microsoft internal systems and won’t be able to expedite the process.
For detailed steps, kindly refer to the referenced thread: Denied global administrator access although I am the only admin
Hope this info helpful.
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