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I am using like below code.

When we use WifiEnterpriseConfig, is enterpriseConfig.setCaCertificate(ca) required? Or is there any way to account for when I manually configure the wifi network via the settings app on an android device, & I choose "use System Certificates" as CA certificate and set the domain to for example "example.org"?

Currently this code crashes the app when executing this code, the network is configured but CA Cert is set to "no validation" and the domain is not set.

WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiConfiguration targetConfig = new WifiConfiguration();
targetConfig.SSID = '"' + targetSSID + '"';
targetConfig.allowedKeyManagement.clear();
targetConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_EAP);
targetConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.IEEE8021X);
WifiEnterpriseConfig ec = new WifiEnterpriseConfig();
ec.setIdentity(userName);
ec.setPassword(password);
ec.setEapMethod(WifiEnterpriseConfig.Eap.PEAP);
ec.setPhase2Method(WifiEnterpriseConfig.Phase2.MSCHAPV2);
ec.setDomainSuffixMatch("example.org");
// How can I set "use system certificates" for:
// ec.setCaCertificate(?); ???
targetConfig.enterpriseConfig = ec;
final WifiNetworkSuggestion suggestion1 =
        new WifiNetworkSuggestion.Builder()
                .setSsid(targetSSID)
                .setWpa2Passphrase(password)
                .setWpa2EnterpriseConfig(targetConfig.enterpriseConfig)
                .setIsAppInteractionRequired(true)
                .build();
final List<WifiNetworkSuggestion> list = new ArrayList<>();
list.add(suggestion1);
int result = wifiManager.addNetworkSuggestions(list);
if (result == WifiManager.STATUS_NETWORK_SUGGESTIONS_SUCCESS) {
    Log.d("testLog", "success");
} else {
    Log.d("testLog", "failed");
        
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