Final answer:
The system is Single Sign-On (SSO), which allows users to access multiple applications with a single set of credentials, reducing password fatigue and centralizing account management.
Step-by-step explanation:
The system described allows users to log on once with their credentials and then access other systems in the organization without logging on again. This is known as Single Sign-On (SSO). SSO is a user authentication process that permits a user to enter one name and password in order to access multiple applications. It simplifies the user experience by reducing password fatigue from different user-name and password combinations and time spent re-entering passwords for the same identity. This system is also beneficial for IT because it centralizes the management of user accounts and credentials, making it easier to enforce security policies.