Access local NAT via VPN on AWS Fortigate instance

Hi,

we have successfully implemented an aws ec2 instance with FortigateVM installed on it, which our company is now using as an SSL VPN. This works very well, and we'd like to continue down that path.

The problem at the moment is, that we cannot access the Network Attached Storage in our office, when working remotely, using the SSL VPN Client.

Is there a way to make this possible? E.g. to implement a tunnel between our Virtual Fortigate instance and our on premise networks?

Thanks!