FortiGate can't take update from FortiManager

[shahab]

Hi Guys I have a FortiManager 200D    V.5.6.5-build1707 180627 and 3 FortiGate as mention bellow and all of Devices has not licenses:

FortiGate         100E    V5.4.4. build7650

FortiGate         300E   V5.4.9. build4220

FortiGate         200E    V5.6.2 Build1486

FortiGate 100E has connected directly to FortiGate and add to FortiManager without any problems and FortiGate 300E and 200E connected to FortiGate 100E through GRE VPN and added to FortiManager whiteout any problems.

Now I download Signature and placed on FortiManager and a message shown signature added to FortiManager Successfully. So I config FortiGates to received Signature update from FortiManager but all my FortiGates couldn’t take signature update.

It is worth mentioning that I don’t want to connect my fortiManager to internet and i want to do offline.

Please guide me how to config FortiManager and FortiGate to works correctly.

thanks.

[hklb]

If you don't have license for your Fortigate, the FMG wont distribute the signature to the FGT..