Hi You should ask your administrator to reset your MFA registration to be able to add again your account to Microsoft authenticator.
Please don’t forget to accept helpful answer
I have a guestaccount for Microsoft teams. I logged in using my authenticater app in which the guest account was added. Then i got a new phone. But the account could not be transfered to my new phone. I therefore tried to delete the account in the authenticater app. I also deletet cachefiles on my work computer. But it seems like it still thinks i have a registreret account in the authenticate app, since i cant add the account again, it keeps sending me codes to check in the app which i cant see because i dont have the account registrered i the app anymore. What can i do? I cant log in to the guest account since i dont have a password. How can i start over whith the guest account and the authenticater app?