As I said, you need to configure some routes. Add a route to your corporate LAN through your host as a gateway. Just the fact that you tell me that he gets it from home, DHCPP tells me that this is a problem. Your virtual machine only sees 1 default gateway, and it is on the Internet. The VM has no idea that the host has a VPN. Adding this route (on VM machines) triggers any requests that your virtual machine makes to the subnet of your corporate network for routing through your host, not your home router.
Add something like this:
route ADD 10.0.0.0 MASK 255.0.0.0 192.168.1.30
: , 10... *, IP- 192.168.1.30. 10.0.0.0 corp lan 192 ip IP- . .