Refer to the exhibits.

Based on the FortiGate Security Fabric settings shown in the exhibits, to successfully quarantine an endpoint when it is detected as a compromised host (IOC), the following step is required:

Enable Remote HTTPS Access to EMS:This setting allows FortiGate to communicate securely with FortiClient EMS over HTTPS. Remote HTTPS access is essential for the quarantine functionality to operate correctly, enabling the EMS server to receive and act upon the quarantine commands from FortiGate.

Therefore, the administrator must enable remote HTTPS access to EMS to allow the quarantine process to function properly.

References

FortiGate Infrastructure 7.2 Study Guide, Security Fabric and Integration with EMS Sections

Fortinet Documentation on Enabling Remote HTTPS Access to FortiClient EMS