The verification code works by remembering which IP address you use to log in to Luminate Online. By verifying your location with the security code, you are permanently whitelisting that IP address for logging in to your site. Most business networks have a static IP address setup, which means the IP address for your computer will be the same every time you connect to that network and so you will only have to verify once. However, most private networks use a dynamic IP address setup, so you may have to verify repeatedly. Additionally, if you are changing locations often, each location will have to be verified.
If your organization is struggling with this verification process, then please Contact Support and reference this article.