Hi @Sheldon Dickinson • Thank you for reaching out.
If none of your Admin accounts is able to sign in to the Azure portal, it is considered as a lockout scenario. Unfortunately, in this case, there is no other option than opening a support ticket to get access to your tenant. Support team can engage the Data Protection team and will require some evidence that will prove your ownership of the Azure Account to unblock you.
You can open a support ticket using the Azure portal (if you have another Azure account) as well as by calling customer service number for your country/region. Also, please go through Manage emergency access accounts in Azure AD to configure a break-glass account so that, going forward, you don't lock yourself out.
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