Thanks for posting your question in the Microsoft Q&A forum. I hope this video can help you:
https://www.youtube.com/watch?v=dRHoId0-8qA
or these articles
https://support.microsoft.com/en-us/account-billing/back-up-and-recover-account-credentials-in-the-authenticator-app-bb939936-7a8d-4e88-bc43-49bc1a700a40 Common problems with two-step verification for a work or school account - Microsoft Support ** Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful **