For adding user authentication to the ZTNA access for remote or off-fabric users, the following FortiGate feature is required in addition to ZTNA:

FortiGate explicit proxyallows FortiGate to intercept web traffic for authentication purposes.

ZTNA integrates with various FortiGate features to provide secure access and ensure that users are authenticated before accessing resources.

By using an explicit proxy, FortiGate can handle web traffic and enforce authentication policies for remote users who are not directly on the corporate network (off-fabric).

Thus, the correct feature to use for this requirement is the FortiGate explicit proxy.

References

FortiGate Security 7.2 Study Guide, ZTNA and Proxy Configuration Sections

Fortinet Documentation on FortiGate Explicit Proxy and ZTNA Integration

Requirement:

The administrator needs to add an authentication server on FortiClient EMS in a different security zone that cannot allow a direct connection.

Solution Analysis:

The goal is to securely connect FortiClient EMS and the Active Directory server despite being in different security zones.

Evaluating Options:

Installing FortiClient EMS on the same VM as Active Directory (option B) is not practical due to security zone separation.

Configuring a slave FortiClient EMS on a virtual machine (option C) does not address the need for secure communication.

Configuring an Active Directory connector (option D) may not be sufficient without secure routing.

Conclusion:

Deploying a FortiGate device between FortiClient EMS and the Active Directory server ensures secure and controlled access between the two zones.

References:

FortiClient EMS and FortiGate configuration and deployment documentation from the study guides.