Urgent MFA Reset Request – Global Administrator Account

I am requesting assistance to reset the Multi-Factor Authentication (MFA) for our Microsoft 365 Business tenant’s Global Administrator account.

I recently updated the account email address to match our domain. After a phone update, I lost access to the Microsoft Authenticator app that was configured for MFA. Although I still know the password and can sign in successfully, I am unable to complete the MFA verification step.

This account is currently the only Global Administrator on the tenant, and there are no alternative admin accounts available to reset the authentication methods.

I attempted to use the self-service recovery portal (https://passwordreset.microsoftonline.com), but when selecting the “Call my phone” option, I do not receive the verification call, even though the contact number is correctly configured.

At this point, I only require an MFA reset so I can regain full access to the admin portal.

Please advise on the required identity verification steps to proceed with resetting the MFA.

Thank you for your prompt assistance.

@Raja Pothuraju Kindly Assist with this!