Click "Manage Company Security".  This is where you can enable multifactor authentication.

Click the "Password Expiration Days" to update the number of days when passwords will expire.

Click the Authentication Type dropdown to choose "Multi-Factor Authentication". Then each user within their profile can choose to login through Google Authenticator or SMS text messaging.

On the left hand side of the screen you can click "Add New IP Address" to add any IP addresses you would like to whitelist.

Complete the IP Address Information you wish to whitelist.

Click the "Save" button at the top right corner of the page.

How to Set Up Security