LT2P/IPsec VPN

I want to use LT2P/IPsec to connect a Windows 10 client over the internet to a Windows 2019 server. After connecting, the client should still be able to browse the internet. The client needs access to the server's disks Drive mappings and to a service running on a port.So I've set up the VPN according to the documentation and help sites in order to access the server behind a NAT router and conection is fine. The client is able to connect and access the desired server resources, but has no more internet access. I found a help article suggesting to disable the 'use default router' check box