A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation
This looks like an authentication loop between Outlook and Microsoft Authenticator. The supported fixes are:
- Make sure Microsoft Authenticator is open and unlocked. If the app is locked, the entry box or approval prompt might not appear.
- Check that notifications are enabled for Microsoft Authenticator. Silent or disabled notifications can prevent the prompt from appearing.
- Update Microsoft Authenticator to the latest version. An outdated app can cause authentication to fail.
- Check the phone connection. If the device has network issues, switch between Wi-Fi and mobile data and try again.
- Verify the phone date and time are correct. Incorrect device time can break authentication.
- If the sign-in screen offers it, use a verification code instead of waiting for a notification. Authenticator and Outlook one-time codes refresh every 30 seconds, so if the timer is low, wait for the next code before entering it.
- If Outlook mobile is being used for sign-in, open: Outlook app > Home > Settings > Accounts > select the account > Sign-in requests Then copy the code shown there and paste it into the sign-in page.
- If the issue is with passwordless setup and Authenticator keeps sending back to itself, add the account directly in Microsoft Authenticator:
- Open Authenticator
- Select + Add account
- Choose the account type
- Select Sign in with Microsoft
- Complete verification
- If this is a work or school account and the loop continues after these steps, send logs from Authenticator: Authenticator > top-level menu > Send feedback Then contact the organization’s IT admin. If Outlook approval and Authenticator depend on each other, the admin may need to reset MFA or allow re-registration.
Also, never read Authenticator codes to anyone over phone or text. Real support staff should not ask for that code.
- Authentication did not complete | Microsoft Support
- Using Outlook mobile to sign in | Microsoft Support
- Error message "You haven't finished yet" with passwordless sign-in | Microsoft Support
- Microsoft Authenticator FAQs | Microsoft Support
- Unable to log in via Authenticator or Outlook app - Microsoft Q&A