Comment 3 for bug 1726124

To be clear, they are NOT updated in /etc/resolv.conf. They ARE updated in /run/NetworkManager/resolv.conf, but that has no effect since we're not using that for resolution: instead we're using systemd-resolve.

And as I noted above, it does appear that systemd-resolve is notified about the search domains, because "systemd-resolve --status" does show them associated with the openvpn tun0 device.

However, those search domains are never manifested in the /run/systemd/resolve/stub-resolv.conf which is what /etc/resolv.conf is pointing to, so they never take effect.