How to make friends corp. network + WLAN?

Question

Network administration

We have:
- corporate network via LAN interface, without Internet access.
- access point (Yota 4G) + Tp-Link (wifi-adapter), with Internet access.
Question:
When I connect wlan, my PC stops seeing the corporate network (but access to network folders by IP address does not disappear), and only the Internet works, respectively.
You need to configure it so that corporate traffic goes through the organization's gateway and the Internet works at the same time.
PS: Previously, the Internet was through the corporate network, but the company's management considered that we did not need it and closed access. The specifics of the work is such that Internet access is often required.

Answer 1

Through the routing setting ... access to the network 0.0.0.0/0 must go through your access point + TP-Link!
The route print command will help you (if the network is Windows)
Something like this ...

Answer 2

PS: Previously, the Internet was through the corporate network, but the company's management considered that we did not need it and closed access. The specifics of the work is such that Internet access is often required.

A service addressed to the chief with a rationale for the need for access to the global network - solves the problem if "The specifics of the work are such that access to the Internet is often required." really takes place.

route -p add 0.0.0.0 mask 0.0.0.0 IP-4G-ROUTER metric 1
route -p add 192.168.1.0 mask 255.255.255.0 192.168.1.1 metric 1