I hope someone else has this problem an knows any solution...
We deployes FortiClient EMS 7.0.2 now we are deploying FortiClient 7.0.2 to our server. Last week I installed it to one of our DCs, afterwards the CPU usage turn into the hell, from 4 % to neerly 99% permanently. But at the most time there are not the FortiClient services which are high loaded, but processes like Local Security Authority, System and System interrupts. The FortiClient Network Access Control process is also one of the top process.
After uninstall FortiClient from DC the CPU load was going back to normal state.
Also interesting is that this behavior is only on the Domain Controllers an not on other servers.
which features are enabled for Forticlient that runs on the DC and which OS version you are running on the DC ? You can use ProcessExplorer to see the which service/daemon causes high CPU utilisation - if you can provide this information that would also help.