Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear @Norbert Schotte
I understand that you have already spent hours trying to reach support. Since no working alternative verification method is available, this needs an administrator-access recovery review, rather than another password reset or Authenticator reinstall.
First, is there another Global Administrator in .onmicrosoft.com who can still sign in? If so, they may be able to reset your authentication methods. An administrator in a separate organization cannot reset them directly.
Since you mentioned trying another business account, I recommend checking whether that account can open a service request, rather than only accessing the support assistant:
- Sign in to the Microsoft 365 admin center with the accessible business administrator account.
- Select Help & support, describe the issue, then select the Contact Support headset icon after the suggested results.
- Choose email or a callback, if offered, and provide an email address you can currently access. These are Microsoft’s documented online support steps.
Use this description:
I am submitting this request on behalf of a different, inaccessible tenant: .onmicrosoft.com. The administrator is blocked by an Authenticator verification loop, and no usable alternative MFA method is available. Telephone support repeatedly disconnects. Please assess this for administrator tenant-access recovery and route it to the appropriate Data Protection team. Please provide a case number and arrange ownership verification through my accessible contact address.
I cannot open or escalate a Microsoft support case from this community reply. However, identifying exactly where the other business account failed will help determine the next step: did you receive a permission error, find no Contact Support option, or submit a request that was subsequently redirected?
Keep your invoices and domain-ownership evidence ready, but submit them only through a verified, private Microsoft support channel. Microsoft will determine the verification required.