Two-factor authentication (2FA) can be enabled by accessing "Account security" as shown below:
Any company administrator can enable two-factor authentication options for the account.
To complete the set up of 2FA, 1) add mobile phone number capable of receiving an SMS (text) message and 2) click Send Code:
Next, 1) enter the OTP code received and 2) click "Verify Code" to complete the set up.
Once enabled, users will be required to validate their log in with the selected 2FA method in order to log into their account: