Old Azure/Entra tenant is inaccessible but still generating unexpected Azure billing charges

Thank you.Hello,

I need help recovering access to an old personal Microsoft Entra / Azure tenant that is still generating billing charges.

The tenant still exists:

• Display name: Default Directory
• Default domain: <my old personal Gmail Microsoft account>

Historically, my personal Microsoft account <my old personal Gmail Microsoft account was the Global Administrator of this tenant. I still have Microsoft emails from 2024 and 2025 explicitly confirming that this account was a Global Administrator for the tenant.

However, Microsoft Sign-In now says that <my old gmail account> does not exist as a Microsoft account, so I can no longer access the tenant.

If I try to access the tenant using my current work Microsoft account, I receive:

AADSTS50020

User account does not exist in tenant “Default Directory” and cannot access the Azure Portal application in that tenant.

At the same time, I am still receiving unexpected Microsoft Azure invoices associated with this tenant. The invoice links themselves contain:

• expectedLoginId=******@gmail.com
• the same tenant ID as this old Default Directory

The charges appear to be related to an old Azure DevOps organization and paid Basic + Test Plans licenses that were unintentionally left assigned.

The Azure DevOps billing subscription is now shown as no longer valid, but I still cannot access the underlying Azure billing account or tenant to properly review or close it.

So I currently have a circular problem:

• Microsoft is sending Azure invoices for this tenant.
• The original Global Administrator account is no longer recognized by Microsoft Sign-In.
• My current Microsoft account is not a member of the tenant.
• I cannot add myself to the tenant because I no longer have administrative access.

My questions are:

1. What is the official process to recover access to an Entra tenant when the original Global Administrator Microsoft account is no longer recognized?
2. Can Microsoft restore access or verify ownership using historical Global Administrator emails and billing records?
3. Is there a way to identify the remaining Global Administrator UPN/account for this tenant?
4. How can I stop all further Azure billing associated with this inaccessible tenant?
5. Which Microsoft support team handles tenant recovery together with billing disputes when the Azure Portal itself cannot be accessed?

I can provide the full Tenant ID, invoice numbers, historical Microsoft emails proving Global Administrator ownership, and AADSTS50020 screenshots privately to Microsoft Support.

Thank you.