Hi Wurzlsepp,
I have used VPN console in FortiManager before. You typically use this when you want to create a large number of VPN tunnels such as deploying mesh or star configurations.
If you do not have a large deployment, or you have complex needs, it may not be suitable to use VPN console, for having the additional flexibility of defining VPN tunnels per FortiGate.
That said, there are some functions for creating phase1/phase2 to external unmanaged gateway.
You don' t mention what version of FortiManager / FortiOS you are working with. Please ensure you have the latest version as there have been improvements to VPN console over time.
Create a VPN topology (mesh/star/dialup) and then edit it by either right-click -> Manage Gateways, or by clicking the name of the topology you created - depending on your FMGR version.
Then when you add a gateway you can add an external gateway (unmanaged by FMGR), and should have some additional options.
If that doesn' t get you pointed in the right direction, please post what you are trying to accomplish and specific parts that you are having trouble with, and don' t forget that docs.fortinet.com is your friend!
Cheers!
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Sean Toomey, CISSP FCNSP
Consulting Security Engineer (CSE)
FORTINET— High Performance Network Security