An offline installer is essential if you are setting up a machine in a restricted environment or a lab with no gateway access.
Find the specific for a version to verify your download. forticlient 5.6 download offline installer
: Unlike newer versions that often require a FortiClient EMS (Enterprise Management Server) connection, 5.6 offers a more robust "standalone" experience. An offline installer is essential if you are
To disable auto-update (critical for EOS versions): forticlient 5.6 download offline installer
msiexec /i "FortiClient_5.6.10_x64.msi" /quiet /norestart ADDLOCAL=ALL