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Get Started Now!Two-Factor Authentication adds a layer of security by adding a second step to the login process. WHMCS includes three Two-Factor Authentication services that you can choose.
For more information, see Two-Factor Authentication.
Enable Two-Factor Authentication
To enable Two-Factor Authentication for a WHMCS installation:
1. In the WHMCS Admin Area, go to Configuration > System Settings > Two-Factor Authentication or, prior to WHMCS 8.0, Setup > Staff Management > Two-Factor Authentication.
2. Click Activate for the desired service.
![Activate Two-Factor Authentication](https://media.screensteps.com/image_assets/assets/005/804/304/original/ba0dceff-8792-4fba-8731-483f685f1d06.png)
3. Select whether to enable Two-Factor Authentication for clients and for admins:
![Enable for Clients or Admins](https://media.screensteps.com/image_assets/assets/003/235/623/original/318f20e3-d1ab-4616-adcb-3108e043b09a.png)
DuoSecurity and YubiKey require additional configuration. For more information, see DuoSecurity.
5. Click Save.
Repeat these steps for each service that you would like to enable.