Hello Umasankar Paravada,
As discussed during our call, you were able to log in to your Azure tenant at admin.cloud.microsoft.com. To reset your MFA, we created a new user with Global Administrator rights. Using this new account to log in to the Azure Portal, we successfully reset the MFA for your personal account, which had been added as a guest account in the tenant.
Below are the steps we followed to reset the MFA:
- Sign in to the Microsoft Entra admin center.
- Navigate to Identity > Users > All users.
- Select the affected user, then choose Authentication methods.
- At the top of the window, click on "Require re-register MFA".
After this is done, you should be able to sign in again and register a new MFA authentication method when prompted.