diff --git a/app/Http/Controllers/Auth/SamlController.php b/app/Http/Controllers/Auth/SamlController.php
index 48c8d05ab8..5a2075daed 100644
--- a/app/Http/Controllers/Auth/SamlController.php
+++ b/app/Http/Controllers/Auth/SamlController.php
@@ -128,7 +128,8 @@ class SamlController extends Controller
     public function sls(Request $request)
     {
         $auth = $this->saml->getAuth();
-        $sloUrl = $auth->processSLO(true, null, null, null, true);
+        $retrieveParametersFromServer = $this->saml->getSetting('retrieveParametersFromServer', false);
+        $sloUrl = $auth->processSLO(true, null, $retrieveParametersFromServer, null, true);
         $errors = $auth->getErrors();
         
         if (!empty($errors)) {
diff --git a/app/Services/Saml.php b/app/Services/Saml.php
index bb6c24cffb..fa2eb13105 100644
--- a/app/Services/Saml.php
+++ b/app/Services/Saml.php
@@ -324,6 +324,20 @@ class Saml
         return $this->_auth;
     }
 
+    /**
+     * Get a setting.
+     * 
+     * @author Johnson Yi <jyi.dev@outlook.com>
+     * 
+     * @param string|array|int $key
+     * @param mixed $default
+     * 
+     * @return void
+     */
+    public function getSetting($key, $default = null) {
+        return data_get($this->_settings, $key, $default);
+    }
+
     /**
      * Gets the SP metadata. The XML representation.
      *