What version of Windows are you installing on? If it is a Windows 7
device, then there is a patch necessary to allow Windows 7 to support
SHA-2 code signing. If this is the case, more information can be found
here on how to patch your device:
Try disabling IPv6 on their network interfaces if not in use. There is
an issue being tracked where FortiClient seems to stop resolving when
ISPs have DNS over IPv6 enabled and doesn't move past it to your IPv4
DNS servers. Just a guess, might be unr...
You may want to investigate FortiClient Cloud - a SaaS based EMS from
Fortinet. This video link below gives a good overview, with the
following updates:The Premium Cloud License is no longer a
requirement.The maximum supported devices is now 5,000.Fo...