OpenVPN ignoring client settings

[bazbaz]

Hi
I have an OpenVPN server configured for dial up access. All works fine, except for "client settings". I need to assign to connected client some DNS server resolvers (and maybe "DNS default domain" + "domain search list"). I configured related settings in DNS server tab, but still clients after connection did not change DNS resolver (TAP adapter interface does not report any DNS or DHCP related values, and nslookup points to DNS existing before the VPN connection).

OPNSense is 23.1.9
Clients are OpenVPN Connect (3.3 or 3.4) on Windows

any idea?
thanks