MsQuic

uint16_t preferredPort;
if (SUCCEEDED(XNetworkingQueryPreferredLocalUdpMultiplayerPort(&preferredPort)))
{
    QUIC_ADDR localAddress = {};
    localAddress.si_family = AF_UNSPEC;
    localAddress.Ipv4.sin_port = htons(preferredPort);

    QUIC_STATUS status = MsQuicCallTable->SetParam(
        MsQuicConnectionHandle,
        QUIC_PARAM_LEVEL_CONNECTION,
        QUIC_PARAM_CONN_LOCAL_ADDRESS,
        sizeof(localAddress),
        &localAddress);
}