If you've enabled two-factor authentication (2FA) this means your employees are required to enter a one-time passcode as well as their login details.
If you no longer want 2FA to be required, you can disable it from within your 2FA settings.
Click on your name on the top right, then click Settings.
On the settings menu click Security, then click Sage accounts and two-factor authentication.
Click Disable two-factor authentication.
2FA is now disabled for this company. An employee will only be asked to use 2FA if they have another employer that uses Sage HR, they have used the same email address, and they require 2FA.