Ugh, I’ve been stuck in that loop before, and it’s so frustrating. What worked for me was reaching out to our IT admin—they were able to reset my MFA settings, and then I could re-add the account to the authenticator app with a new QR code. None of the usual tricks like clearing cache or reinstalling the app helped, so I’d say don’t waste too much time trying that. Just get in touch with whoever manages your Microsoft 365 setup—they’ll fix it way faster.