What availability risk does onsite authentication create for traveling users accessing 3rd party applications?

The availability risk associated with onsite authentication for traveling users accessing third-party applications primarily revolves around the dependence on their home organization's infrastructure. When users have to authenticate against systems located within their organization, it creates a potential single point of failure. If the home organization's services are offline—whether due to network issues, maintenance, or power outages—users traveling away from the site may find themselves unable to access critical applications or resources. This scenario highlights the importance of considering availability in authentication processes, especially for users who frequently travel.

In contrast, the other options do not directly address the availability risk prompted by onsite authentication in the context of traveling users. While applications not being secure, dependence on outdated systems, and higher authentication failures can present various challenges, they do not specifically illustrate the limitations in access that could occur when the home organization is unavailable.