diff --git a/public/admin/ldap-test/index.php b/public/admin/ldap-test/index.php
index 185f8692..322bee20 100644
--- a/public/admin/ldap-test/index.php
+++ b/public/admin/ldap-test/index.php
@@ -10,6 +10,7 @@ use App\LdapProvisioner;
 $projectRoot = dirname(__DIR__, 3);
 $config = ConfigLoader::load($projectRoot, 'registration');
 $ldap = new LdapProvisioner($config);
+$diagnostics = $ldap->diagnostics();
 
 $serviceResult = $ldap->testServiceBind();
 $messages = [];
@@ -84,6 +85,20 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                 <p><?= htmlspecialchars((string) ($serviceResult['message'] ?? ''), ENT_QUOTES) ?></p>
             </div>
 
+            <div class="login-notice login-notice-info">
+                <strong>Verbindungsdaten</strong>
+                <ul class="login-list">
+                    <li>Host: <?= htmlspecialchars((string) ($diagnostics['host'] ?? ''), ENT_QUOTES) ?></li>
+                    <li>Port: <?= htmlspecialchars((string) ($diagnostics['port'] ?? ''), ENT_QUOTES) ?></li>
+                    <li>Bind-DN: <?= htmlspecialchars((string) ($diagnostics['bind_dn'] ?? ''), ENT_QUOTES) ?></li>
+                    <li>Users-DN: <?= htmlspecialchars((string) ($diagnostics['users_dn'] ?? ''), ENT_QUOTES) ?></li>
+                    <li>StartTLS: <?= htmlspecialchars((string) ($diagnostics['starttls'] ?? ''), ENT_QUOTES) ?></li>
+                    <li>Gruppenmodus: <?= htmlspecialchars((string) ($diagnostics['group_assignment_mode'] ?? ''), ENT_QUOTES) ?></li>
+                    <li>Gruppenattribut: <?= htmlspecialchars((string) ($diagnostics['group_member_attribute'] ?? ''), ENT_QUOTES) ?></li>
+                    <li>PHP LDAP-Erweiterung: <?= htmlspecialchars((string) ($diagnostics['ldap_extension'] ?? ''), ENT_QUOTES) ?></li>
+                </ul>
+            </div>
+
             <?php if ($messages !== []): ?>
                 <div class="login-notice login-notice-success">
                     <strong>Ergebnis</strong>
diff --git a/src/App/LdapProvisioner.php b/src/App/LdapProvisioner.php
index 1ca05ece..41c96832 100644
--- a/src/App/LdapProvisioner.php
+++ b/src/App/LdapProvisioner.php
@@ -28,6 +28,23 @@ final class LdapProvisioner
             && function_exists('ldap_add');
     }
 
+    /**
+     * @return array<string, string>
+     */
+    public function diagnostics(): array
+    {
+        return [
+            'host' => trim((string) ($this->config['ldap']['host'] ?? '')),
+            'port' => (string) ((int) ($this->config['ldap']['port'] ?? 389)),
+            'bind_dn' => trim((string) ($this->config['ldap']['bind_dn'] ?? '')),
+            'users_dn' => trim((string) ($this->config['ldap']['users_dn'] ?? '')),
+            'starttls' => ((bool) ($this->config['ldap']['use_starttls'] ?? false)) ? 'aktiv' : 'inaktiv',
+            'group_assignment_mode' => trim((string) ($this->config['ldap']['group_assignment_mode'] ?? 'group_memberuid')),
+            'group_member_attribute' => trim((string) ($this->config['ldap']['group_member_attribute'] ?? 'memberUid')),
+            'ldap_extension' => $this->canUseLdap() ? 'verfügbar' : 'nicht verfügbar',
+        ];
+    }
+
     /**
      * @return array{success: bool, message: string}
      */