If Microsoft isn’t sending your security code, first check the destination email or phone and confirm that the masked contact details are yours. If the code still does not arrive, stop requesting more codes, try another verification method already linked to your account, and allow time for a possible temporary block to clear.
Way 1: Check where the code should arrive
Microsoft sends verification codes only to an email address or phone number already listed as a sign-in verification method. At the verification prompt, compare the masked destination with your contact details. If it is unfamiliar or no longer accessible, choose another listed method rather than repeatedly requesting a code.
If you chose email
- Check the inbox for the correct address, including Junk or Spam. A valid Microsoft verification message comes from an address ending in @accountprotection.microsoft.com. If needed, add that sender to your trusted senders.
- If the destination is another Outlook, Hotmail, Live, or MSN account, use separate private-browsing windows to keep both accounts signed in while retrieving the code.
- If you can sign in and still have access to a security method, review or update your details at Microsoft account security.
If you chose a text message
- Check whether your phone blocks messages from unknown senders, whether its message inbox is full, and whether the messaging app is working properly.
- Temporary SMS service problems or regional restrictions can interfere with delivery. Microsoft does not accept VOIP numbers for sign-in verification; use a mobile number.
- SMS availability is changing: Microsoft says it is beginning to phase out SMS for authentication and account recovery on personal Microsoft accounts. The methods offered depend on the account, so use the options shown on your own security page.
If you chose Microsoft Authenticator
Check the device’s internet connection, update the app, allow notifications, verify that the device date and time are correct, and test without a VPN. An authenticator app may also generate codes while its device is offline, if that option is set up for your account.
Way 2: Try another method or wait for a temporary block
Microsoft may temporarily stop sending codes after unusual activity, repeated requests, or other risk signals. Select another verification method already linked to the account—for example, an alternate email instead of SMS—and try a different network. Avoid rapid or repeated requests; Microsoft warns that excessive requests can cause it to block delivery.
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- POWERFUL SECURITY KEY: The Security Key C NFC is the essential physical passkey for protecting your digital life from phishing attacks. It ensures only you can access your accounts.
- WORKS WITH 1000+ ACCOUNTS: Compatible with Google, Microsoft, and Apple. A single Security Key C NFC secures 100 of your favorite accounts, including email, password managers, and more.
- FAST & CONVENIENT LOGIN: Plug in your Security Key C NFC via USB-C and tap it, or tap it against your phone (NFC) to authenticate. No batteries, no internet connection, and no extra fees required.
- TRUSTED PASSKEY TECHNOLOGY: Uses the latest passkey standards (FIDO2/WebAuthn & FIDO U2F) but does not support One-Time Passwords. For complex needs, check out the YubiKey 5 Series.
- BUILT TO LAST: Made from tough, waterproof, and crush-resistant materials. Manufactured in Sweden and programmed in the USA with the highest security standards.
Microsoft’s guidance is to wait a day for a temporary block to clear. If delivery still does not work after 24 hours, wait longer—up to a week if possible—rather than continuing to request codes. The timing is not guaranteed.
If you cannot use any listed verification method
If you know your password and can still access at least one security method, add and confirm a replacement before removing the method you have lost. Replacing all security information at once can restrict access for 30 days.
Rank #2
- POWERFUL SECURITY KEY: The Security Key NFC is the essential physical passkey for protecting your digital life from phishing attacks. It ensures only you can access your accounts.
- WORKS WITH 1000+ ACCOUNTS: Compatible with Google, Microsoft, and Apple. A single Security Key NFC secures 100 of your favorite accounts, including email, password managers, and more.
- FAST & CONVENIENT LOGIN: Plug in your Security Key NFC via USB-A and tap it, or tap it against your phone (NFC) to authenticate. No batteries, no internet connection, and no extra fees required.
- TRUSTED PASSKEY TECHNOLOGY: Uses the latest passkey standards (FIDO2/WebAuthn & FIDO U2F) but does not support One-Time Passwords. For complex needs, check out the YubiKey 5 Series.
- BUILT TO LAST: Made from tough, waterproof, and crush-resistant materials. Manufactured in Sweden and programmed in the USA with the highest security standards.
If none of your listed security information is available, choose I don’t have any of these during sign-in and follow Microsoft’s steps to replace it. Microsoft says you must wait 30 days before signing in after replacing all security information. If you also cannot use your password, start with the Microsoft Sign-in Helper and follow the account recovery form guidance. Support agents cannot bypass account security by sending verification or password-reset codes.
If you previously generated a Microsoft account recovery code, it is a separate 25-digit recovery option. Creating a new recovery code invalidates the old one; keep it somewhere safe, not on a device you use to sign in.
Rank #3
- POWERFUL SECURITY KEY: The YubiKey 5 NFC is the most versatile physical passkey, protecting your digital life from phishing attacks. It ensures only you can access your accounts
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5 NFC secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5 NFC via USB and tap it, or tap it against your phone (NFC), to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
Choose backup methods before you need them
Microsoft says an account can have up to 10 verification methods, though available choices vary. Options may include email, Microsoft Authenticator, passkeys, and, where offered, a phone number. Microsoft also lists physical security keys among passwordless sign-in methods. When deciding what to add, consider whether you have already set it up, can access it now, whether it works offline, and whether Microsoft offers it for your account. A physical security key is an alternative sign-in method, not a fix for a code that is failing to arrive.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.If you receive a code you did not request
Do not share the code or reply to the message. Microsoft says an unexpected code may mean someone entered the wrong contact detail or is trying to access your account. Without the code, that person cannot complete verification.
Quick Recap
Best Value
- Security Key : Protect your online accounts against unauthorized access by using FIDO2 and U2F authentication with T110. It's the world's most protective security key that works with windows, Mac OS, Linux as well as Chrome, Firefox, Edge and many other major browsers.
- Certified with the new FIDO2 standard, T110 provides the benefit of fast login and strong protection against phishing, account takeover as well as many other online attactks.
- Works with : Bank of America, Github, Google, Microsoft, DUO, Twitter, Facebook, Dropbox, Apple, ebay, BINANCE, mor and more.
- Fits USB-A port : Insert the T110 security key into the USB-A port of each service and log in conveniently with one touch
- For the driver download and user guide, please visit TrustKey Solutions Home support page.
Rank #4
- POWERFUL SECURITY KEY: The YubiKey 5C NFC is the most versatile physical passkey, protecting your digital life from phishing attacks. It ensures only you can access your accounts
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5C NFC secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5C NFC via USB and tap it, or tap it against your phone (NFC), to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
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