1. FortiGate CLI Reference 7.4, "config user group," Volume 2, page 1038. The documentation shows that the member attribute can accept the name of a fabric connector, including FortiClient EMS.
2. FortiClient EMS Administration Guide 7.4, "Configuring ZTNA tags and firewall policies," page 235. This section details creating a FortiClient EMS connector on FortiGate and using it as a member in a user group for policy enforcement.
3. ZTNA Deployment Guide 7.4, "Configuring ZTNA tags on FortiGate," page 28. The guide provides an example of creating a user group on FortiGate with the FortiClient EMS connector as a member.