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Hello Artur,
Thanks for your question.
Generally, the only way for work/school accts is to have your IT admins reset your account and prompt you again to re-register MFA. They will be able to revoke and reset MFA for your account which will prompt you to re-register.
If the above account is a Microsoft account you can try: https://account.live.com/acsr
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola