Hello Paul and welcome to the Microsoft Q&A Community. As I understand, your personal Microsoft account was added as a guest or external user to an organization's Azure AD tenant. Now that your account is locked in that tenant, any attempt to sign in to services like the Azure Portal redirects you to that organization's login flow, which fails due to the lockout.
Microsoft provides a way to leave organizations you've been added to—but only if the organization allows it.
- Visit: Leave an organization Leave an Organization - Microsoft Entra External ID | Microsoft Learn
- Sign in with your personal Microsoft account.
- If successful, you’ll see a list of organizations and can click Leave next to the one you want to disassociate from.
Limitation: This only works if the organization has enabled self-service removal. If you see a message saying you can't leave, you’ll need admin intervention.
If that step does not work then, use the general Microsoft Support contact page to raise a support ticket:
- Go to: Microsoft Support Contact
- Choose Account & billing > Microsoft account.
- Explain that your personal account is locked in an Azure AD tenant and you need help disassociating it.
Include:
- Your Microsoft account email.
- The name of the organization (if known).
- A description of the error and that you can't access Azure Portal or My Apps.
Microsoft Support can escalate this to the Azure AD team if needed.
Sometimes cached sessions redirect you to the locked tenant. Try:
- Opening a browser in Incognito/Private mode.
- Navigating to https://portal.azure.com.
- Logging in with your personal account.
If it still redirects to the locked tenant, it confirms the association is still active.