i can't receive the code from the authenticator app

Try these steps in order:

1. Check Microsoft Authenticator on the phone
   • Make sure the app is unlocked.
   • Make sure notifications are enabled for Microsoft Authenticator.
   • If notifications are silent or disabled, the approval prompt may not appear.
2. Check the device state
   • Make sure the phone has an active internet connection.
   • Switch between Wi-Fi and mobile data.
   • Make sure the phone’s date and time are correct.
3. Update the app
   • Install the latest version of Microsoft Authenticator.
   • An outdated app can cause authentication to fail.
4. Use another verification method if available
   • On the sign-in screen, select Other verification options or Try another verification method.
   • If SMS or email is available on the account, use that instead.
5. Avoid repeated code requests
   • Too many repeated requests can trigger a temporary block.
   • Wait 24 hours before trying again.
   • If it still does not work, wait longer, up to 1 week.
6. If SMS is also failing
   • Check that the phone number is correct in the account security info.
   • VOIP numbers cannot be used for sign-in or verification codes; a mobile phone number is required.
   • If the phone blocks texts from unknown numbers, change that setting and request a new code.
7. If the app shows “Authentication did not complete”
   • Open the app and keep it unlocked.
   • Check whether the code arrived silently by text.
   • Retry after confirming notifications and connectivity.
8. If no verification method works
   • For a personal Microsoft account, use the sign-in helper or account recovery flow.
   • For a work or school account, contact the organization’s IT admin to reset or re-register MFA methods.

If the problem continues after these checks, send diagnostics from the app: open Microsoft Authenticator, go to the app’s top-level menu, and select Send feedback.

References:

• Authentication did not complete
• Troubleshoot Microsoft verification code issues
• "We didn't receive a response" error message when you try to sign in by using Azure Multi-Factor Authentication
• How can I fix Verify your identity issues? - Microsoft Q&A
• Not receiving a code to log in - Microsoft Q&A