Site to Site VPN not working for remote VPN users

Hi,

I have a client which has 2 offices connected with open vpn. Users in each network have access to the servers of the other network, however, remote users (connecting from their homes to a office) cannot. To some users the configuration works, coincidentally those users were part of the windows domain but might be coincidence. Other users can't even ping the opposite network's servers.

The open VPN server is on a draytek router, so basicly the config it has is the username and password for the users. This is my client's config file.

client

dev tun

proto tcp-client

nobind

ping 10

remote [IP] 1194

resolv-retry infinite

#verb 5

cipher aes-256-cbc

auth sha256

auth-user-pass

dhcp-option DNS 192.168.10.10

ca oVPN.crt

cert OClient.crt

key OClient.key

#redirect-gateway autolocal def1

persist-key

persist-tun

reneg-sec 3600

The network was already configured, I just implemented the remote (home to office) VPN. Also, if there is any obvious fault in my openVPN Client config, feel free to let me know. I have made the rough diagram of the network, here.

Thank you.