Security Key for 2nd Factor Login Authentication

Use a Security Key on Computer or Phone

After registering your security key for your MS Office account or any other desired accounts, the next time you log in, enter your password, and you’ll then be prompted to present your security key. On a computer, you’ll insert the key into the USB port and tap the capacitive disk. Alternatively, if your phone and security key both support NFC, you just hold the key against the phone when prompted. On iPhones, you’ll hold the key near the top speaker; on Android phones, you slowly move the key across the back until your phone buzzes. If your key has the appropriate connector, you can also plug your security key directly into your phone.

You should enroll a backup key in case your security key is lost or damaged. To do so, you just follow the same steps again, and then store the backup key somewhere safe.

What happens if I lose my security key?

Most sites that allow security keys will also provide backup codes when registering, that you can use in an emergency. Copy & keep these someplace safe and secure. The most secure (though perhaps not the most practical) option is to buy a second security key to enroll as a backup for your accounts. If lost, delete the lost security key from your sign-in methods in the account's settings. 

If you've lost your key or do not have it, login to O365 with your username & password & click "Other Ways to Sign In" to select from the other Sign-in methods you have set up. (If the prompt for your key's PIN appears, click "Cancel" & then select "Other Ways to Sign In".)

Enrolling in multiple MFA methods will keep you from being locked out, but they may also be susceptible to phishing. If you mix MFA systems, be wary of messages telling you not to use a security key, since it could be a phishing attack.