- Duo can call your office line if you have set it up as an alternate number. We recommend adding at least your office line, and possibly other lines as appropriate. For example, you may want to have a spouse's mobile number as an option in case of emergency.
- When you first enroll in Duo, send yourself codes via text (SMS) messaging. These codes should be kept with you in a safe location and can only be used once. If you generate new codes, all old codes will become invalidIt is highly recommended that you generate and print backup codes that you can use when you do not have access to your other devices, such as phone. Connect to https://accounts.lehigh.edu/duocodes/generate to generate and print these codes. Remember to store the codes in a safe location such as your wallet.
- You can use a USB Security Key, available from YubiKey and other vendors. Again, this must be set up in advance.