diff --git a/core/templates/untrustedDomain.php b/core/templates/untrustedDomain.php
index 297220c92b..1443c41282 100644
--- a/core/templates/untrustedDomain.php
+++ b/core/templates/untrustedDomain.php
@@ -6,12 +6,8 @@
 	<p>
 		<?php p($l->t('Please contact your administrator. If you are an administrator, edit the "trusted_domains" setting in config/config.php like the example in config.sample.php.')); ?>
 	</p>
+	<br />
 	<p>
-		<?php p($l->t('Depending on your configuration, this button could also work to trust the domain:')); ?>
-	</p>
-	<p style="text-align:center;">
-		<a href="<?php print_unescaped(\OC::$server->getURLGenerator()->getAbsoluteURL(\OC::$server->getURLGenerator()->linkToRoute('settings.AdminSettings.index'))); ?>?trustDomain=<?php p($_['domain']); ?>" class="button">
-			<?php p($l->t('Add "%s" as trusted domain', array($_['domain']))); ?>
-		</a>
+		<?php print_unescaped($l->t('Further information how to configure this can be found in the %sdocumentation%s.', ['<a href="' . $_['docUrl'] . '" target="blank">', '</a>'])); ?>
 	</p>
 </div>
diff --git a/lib/base.php b/lib/base.php
index fa2f5011f1..f3e2e734d0 100644
--- a/lib/base.php
+++ b/lib/base.php
@@ -778,7 +778,7 @@ class OC {
 				OC_Response::setStatus(\OC_Response::STATUS_BAD_REQUEST);
 				header('Status: 400 Bad Request');
 
-				\OC::$server->getLogger()->warning(
+				\OC::$server->getLogger()->info(
 					'Trusted domain error. "{remoteAddress}" tried to access using "{host}" as host.',
 					[
 						'app' => 'core',
@@ -788,7 +788,7 @@ class OC {
 				);
 
 				$tmpl = new OCP\Template('core', 'untrustedDomain', 'guest');
-				$tmpl->assign('domain', $host);
+				$tmpl->assign('docUrl', \OC::$server->getURLGenerator()->linkToDocs('admin-trusted-domains'));
 				$tmpl->printPage();
 
 				exit();
diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index 99023096bc..c24b1832ec 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -898,7 +898,6 @@ return array(
     'OC\\Settings\\Controller\\LogSettingsController' => $baseDir . '/settings/Controller/LogSettingsController.php',
     'OC\\Settings\\Controller\\MailSettingsController' => $baseDir . '/settings/Controller/MailSettingsController.php',
     'OC\\Settings\\Controller\\PersonalSettingsController' => $baseDir . '/settings/Controller/PersonalSettingsController.php',
-    'OC\\Settings\\Controller\\SecuritySettingsController' => $baseDir . '/settings/Controller/SecuritySettingsController.php',
     'OC\\Settings\\Controller\\UsersController' => $baseDir . '/settings/Controller/UsersController.php',
     'OC\\Settings\\Hooks' => $baseDir . '/settings/Hooks.php',
     'OC\\Settings\\Mailer\\NewUserMailHelper' => $baseDir . '/settings/Mailer/NewUserMailHelper.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index 33533569e9..b4af81e36c 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -928,7 +928,6 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OC\\Settings\\Controller\\LogSettingsController' => __DIR__ . '/../../..' . '/settings/Controller/LogSettingsController.php',
         'OC\\Settings\\Controller\\MailSettingsController' => __DIR__ . '/../../..' . '/settings/Controller/MailSettingsController.php',
         'OC\\Settings\\Controller\\PersonalSettingsController' => __DIR__ . '/../../..' . '/settings/Controller/PersonalSettingsController.php',
-        'OC\\Settings\\Controller\\SecuritySettingsController' => __DIR__ . '/../../..' . '/settings/Controller/SecuritySettingsController.php',
         'OC\\Settings\\Controller\\UsersController' => __DIR__ . '/../../..' . '/settings/Controller/UsersController.php',
         'OC\\Settings\\Hooks' => __DIR__ . '/../../..' . '/settings/Hooks.php',
         'OC\\Settings\\Mailer\\NewUserMailHelper' => __DIR__ . '/../../..' . '/settings/Mailer/NewUserMailHelper.php',
diff --git a/settings/Controller/SecuritySettingsController.php b/settings/Controller/SecuritySettingsController.php
deleted file mode 100644
index bda86dff84..0000000000
--- a/settings/Controller/SecuritySettingsController.php
+++ /dev/null
@@ -1,72 +0,0 @@
-<?php
-/**
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- *
- * @author Lukas Reschke <lukas@statuscode.ch>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Roeland Jago Douma <roeland@famdouma.nl>
- *
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *
- */
-
-namespace OC\Settings\Controller;
-
-use \OCP\AppFramework\Controller;
-use OCP\IRequest;
-use OCP\IConfig;
-
-/**
- * @package OC\Settings\Controller
- */
-class SecuritySettingsController extends Controller {
-	/** @var \OCP\IConfig */
-	private $config;
-
-	/**
-	 * @param string $appName
-	 * @param IRequest $request
-	 * @param IConfig $config
-	 */
-	public function __construct($appName,
-								IRequest $request,
-								IConfig $config) {
-		parent::__construct($appName, $request);
-		$this->config = $config;
-	}
-
-	/**
-	 * @return array
-	 */
-	protected function returnSuccess() {
-		return array(
-			'status' => 'success'
-		);
-	}
-
-	/**
-	 * Add a new trusted domain
-	 * @param string $newTrustedDomain The newly to add trusted domain
-	 * @return array
-	 */
-	public function trustedDomains($newTrustedDomain) {
-		$trustedDomains = $this->config->getSystemValue('trusted_domains', []);
-		$trustedDomains[] = $newTrustedDomain;
-		$this->config->setSystemValue('trusted_domains', $trustedDomains);
-
-		return $this->returnSuccess();
-	}
-
-}
diff --git a/settings/js/admin.js b/settings/js/admin.js
index f637cb6459..650bc84930 100644
--- a/settings/js/admin.js
+++ b/settings/js/admin.js
@@ -1,29 +1,4 @@
 $(document).ready(function(){
-	var params = OC.Util.History.parseUrlQuery();
-
-	// Hack to add a trusted domain
-	if (params.trustDomain) {
-		var potentialDomain = params.trustDomain;
-		potentialDomain = encodeURI(escapeHTML(potentialDomain));
-		potentialDomain = '<span class="trusted-domain-warning">' + potentialDomain + '</span>';
-
-		OC.dialogs.confirmHtml(t('settings', 'Are you really sure you want add {domain} as trusted domain?', {
-				domain: potentialDomain
-			}, undefined, {escape: false}),
-			t('settings', 'Add trusted domain'), function(answer) {
-				if(answer) {
-					$.ajax({
-						type: 'POST',
-						url: OC.generateUrl('settings/admin/security/trustedDomains'),
-						data: { newTrustedDomain: params.trustDomain }
-					}).done(function() {
-						window.location.replace(OC.generateUrl('settings/admin'));
-					});
-				}
-			});
-	}
-
-
 	$('#excludedGroups').each(function (index, element) {
 		OC.Settings.setupGroupsSelect($(element));
 		$(element).change(function(ev) {
diff --git a/settings/routes.php b/settings/routes.php
index df49f0af85..9a89d7353e 100644
--- a/settings/routes.php
+++ b/settings/routes.php
@@ -50,7 +50,6 @@ $application->registerRoutes($this, [
 		['name' => 'AppSettings#listCategories', 'url' => '/settings/apps/categories', 'verb' => 'GET'],
 		['name' => 'AppSettings#viewApps', 'url' => '/settings/apps', 'verb' => 'GET'],
 		['name' => 'AppSettings#listApps', 'url' => '/settings/apps/list', 'verb' => 'GET'],
-		['name' => 'SecuritySettings#trustedDomains', 'url' => '/settings/admin/security/trustedDomains', 'verb' => 'POST'],
 		['name' => 'Users#setDisplayName', 'url' => '/settings/users/{username}/displayName', 'verb' => 'POST'],
 		['name' => 'Users#setEMailAddress', 'url' => '/settings/users/{id}/mailAddress', 'verb' => 'PUT'],
 		['name' => 'Users#setUserSettings', 'url' => '/settings/users/{username}/settings', 'verb' => 'PUT'],
diff --git a/tests/Settings/ApplicationTest.php b/tests/Settings/ApplicationTest.php
index 8346f668d9..31391a8fac 100644
--- a/tests/Settings/ApplicationTest.php
+++ b/tests/Settings/ApplicationTest.php
@@ -33,7 +33,6 @@ use OC\Settings\Controller\CheckSetupController;
 use OC\Settings\Controller\GroupsController;
 use OC\Settings\Controller\LogSettingsController;
 use OC\Settings\Controller\MailSettingsController;
-use OC\Settings\Controller\SecuritySettingsController;
 use OC\Settings\Controller\UsersController;
 use OC\Settings\Middleware\SubadminMiddleware;
 use OCP\AppFramework\Controller;
@@ -76,7 +75,6 @@ class ApplicationTest extends TestCase {
 			[GroupsController::class, Controller::class],
 			[LogSettingsController::class, Controller::class],
 			[MailSettingsController::class, Controller::class],
-			[SecuritySettingsController::class, Controller::class],
 			[UsersController::class, Controller::class],
 
 			[SubadminMiddleware::class, Middleware::class],
diff --git a/tests/Settings/Controller/SecuritySettingsControllerTest.php b/tests/Settings/Controller/SecuritySettingsControllerTest.php
deleted file mode 100644
index 75d580d9f8..0000000000
--- a/tests/Settings/Controller/SecuritySettingsControllerTest.php
+++ /dev/null
@@ -1,72 +0,0 @@
-<?php
-/**
- * @author Lukas Reschke
- * @copyright 2014 Lukas Reschke lukas@owncloud.com
- *
- * This file is licensed under the Affero General Public License version 3 or
- * later.
- * See the COPYING-README file.
- */
-namespace Tests\Settings\Controller;
-
-use \OC\Settings\Application;
-use OC\Settings\Controller\SecuritySettingsController;
-use OCP\IConfig;
-use OCP\IRequest;
-
-/**
- * @package Tests\Settings\Controller
- */
-class SecuritySettingsControllerTest extends \Test\TestCase {
-
-	/** @var IConfig|\PHPUnit_Framework_MockObject_MockObject */
-	private $config;
-
-	/** @var SecuritySettingsController */
-	private $securitySettingsController;
-
-	protected function setUp() {
-		parent::setUp();
-
-		$this->config = $this->createMock(IConfig::class);
-		$this->securitySettingsController = new SecuritySettingsController(
-			'settings',
-			$this->createMock(IRequest::class),
-			$this->config
-		);
-	}
-
-	public function testTrustedDomainsWithExistingValues() {
-		$this->config
-			->expects($this->once())
-			->method('setSystemValue')
-			->with('trusted_domains', array('owncloud.org', 'owncloud.com', 'newdomain.com'));
-		$this->config
-			->expects($this->once())
-			->method('getSystemValue')
-			->with('trusted_domains')
-			->will($this->returnValue(array('owncloud.org', 'owncloud.com')));
-
-		$response = $this->securitySettingsController->trustedDomains('newdomain.com');
-		$expectedResponse = array('status' => 'success');
-
-		$this->assertSame($expectedResponse, $response);
-	}
-
-	public function testTrustedDomainsEmpty() {
-		$this->config
-			->expects($this->once())
-			->method('setSystemValue')
-			->with('trusted_domains', array('newdomain.com'));
-		$this->config
-			->expects($this->once())
-			->method('getSystemValue')
-			->with($this->equalTo('trusted_domains'), $this->equalTo([]))
-			->willReturn([]);
-
-		$response = $this->securitySettingsController->trustedDomains('newdomain.com');
-		$expectedResponse = array('status' => 'success');
-
-		$this->assertSame($expectedResponse, $response);
-	}
-}