Hi Ali, this usually happens when push notifications from the Microsoft Authenticator app are blocked or the device registration is out of sync. First, confirm that notifications are enabled for Authenticator in your phone’s system settings and that battery optimization or “Do Not Disturb” isn’t suppressing them. Make sure the app is updated to the latest version and that your phone has a stable internet connection, since push approvals require connectivity. If you recently changed phones or reinstalled the app, you may need to remove the old device registration from your Microsoft account security settings and re‑add the Authenticator by scanning a fresh QR code. If none of this works, use the fallback option of entering the time‑based one‑time password (TOTP) code shown in the Authenticator app instead of waiting for a push prompt. If you are still locked out, you’ll need to initiate account recovery through https://account.live.com/proofs/manage and follow Microsoft’s verification process to regain access.
Harry.