麥塊教育版無法登入，無法傳送電話驗證

wow Admirable courage—going all out just to save the game!

Okay, you are the admin of your own Microsoft 365 tenant, and the sign-in is being blocked at the second factor. Microsoft Entra has flagged your phone number with a bad reputation for SMS, so the text will not be sent no matter how many times you retry. Because you cannot reach the admin portal to remove that phone method yourself, the only workable next step is to ask Microsoft to verify that you own the tenant and clear your MFA from their side.

Please contact Microsoft and ask for the Microsoft 365 Data Protection team. Tell the agent you are the only global admin for a work or school tenant, you are blocked by MFA with SMS error 399287, and you need your MFA methods cleared or a temporary admin access so you can re-register using Microsoft Authenticator.

If you cannot open a case in the admin center because you are locked out, use Microsoft's country phone list and request a callback for Microsoft 365 for business. Keep your tenant name like orgname.onmicrosoft.com, your sign-in UPN, billing email, and any order or invoice numbers handy. They may ask you to prove ownership, typically by confirming billing data or, if you own a custom domain, adding a temporary DNS TXT record.

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Once support clears your MFA, sign in and set up Microsoft Authenticator immediately so future Minecraft Education logins do not rely on SMS. If anything is unclear while you are on the phone with Microsoft, paste your notes here and I will help you phrase the request precisely.

Sigh... I'm completely out of ideas. I keep getting errors 2604 and 2603—it's just a constant stream of failures. I've tried switching locations and devices, but nothing works; I even used the school's equipment, and I've tested both my home and the school's internet connections.