Personal account blocked from Azure portal: AADSTS500571 "guest user account is disabled" in a tenant I don't control

My personal Microsoft account (Hotmail) works normally for Outlook.com and Microsoft 365, but I can't sign in to the Azure portal.

What happened:

• On Nov 8, 2026 (around 11 PM to midnight Eastern), I started an Azure free account signup with this account to register an app for reading my own mailbox.
• Since then, Azure portal sign-in shows "Your account has been locked. Contact your support person to unlock it, then try again."
• Troubleshooting details: Error Code: 500571 (AADSTS500571 - guest user account is disabled) Request Id: 83c6c320-07ad-46a5-b253-813097e1d500 Correlation Id: 01a1c198-1713-7440-ae0a-ec3093a96826 Timestamp: 2026-11-09T18:35:41.065Z
• I'm not knowingly a guest in any organization. I have no admin to contact.

What I've tried:

• Called Microsoft support (Canada) several times. I was sent to the help site, which needs the sign-in that's blocked, so I can't open a ticket.

What I need:

• Identify which tenant holds my disabled guest account, and remove me from it (or re-enable it), so I can sign in to Azure with my personal account or create my own tenant.

I can send my account email and other details privately to a moderator.