How to set up a WIFI router in an existing local network?

Question

Computer networks

Hello.
There was a need to plug the router into an existing local network (it has everything, both DHCP and AD, etc.).
In order for clients to receive domain network settings through the router, turn off DHCP on the router and plug the cable into the LAN.
As a result, I received:
PC cable works
No WIFI
Tell me what's wrong?
Thanks

Answer 1

Disabling DHCP on the router is not enough. You need to disable NAT (transfer the router to access point mode) - AP Mode instead of Gateway / Router Mode.