You are attempting to access an application that is secured by the University of Michigan - Dearborn from an off-campus location and requires a VPN due to the sensitive nature of the data being accessed.
The University of Michigan-Dearborn provides a Virtual Private Network (VPN) to create a secure, encrypted connection between your device and the campus network and enables access to university resources from untrusted networks, such as the internet.
The service enables users to:
extend the university’s private, secure, and managed network to their devices when using off campus networks.
send and receive university or personal data through a dedicated and encrypted connection across shared or public networks.
access applications or data which require an on campus connection (e.g. academic resources, on campus compute and storage services, etc).
For more information on how to ensure the security of your internet connection, consult this link.