Lost Microsoft Authenticator and cannot access Hardware Center Dashboard

Question

Tenant: commotech.onmicrosoft.com

Account: ******@commotech.onmicrosoft.com

I previously used this account to access Microsoft Hardware Center Dashboard for WHQL driver submissions.

After replacing my mobile phone, I lost access to Microsoft Authenticator and can no longer complete MFA verification.

The account still exists and shows registered MFA methods, but I have no access to them.

I also tried to create a Partner Center support ticket, but submission fails with:

"Access denied due to missing subscription key."

Could someone advise the correct support channel or recovery process for this Entra ID account?

I also tried to submit a support ticket through Partner Center Support, but the submission always fails.

The browser console shows:

401 Access Denied

"Access denied due to missing subscription key."

As a result, I cannot create a Partner Center support request and therefore cannot obtain assistance through the normal support process.

Answer 1

This tenant originally had only one administrator account, which is my account.

There are no other Global Administrators available to reset MFA.