diff --git a/.env b/.env
index 0876a707..b9d34b9d 100644
--- a/.env
+++ b/.env
@@ -47,4 +47,7 @@ NO_URL_REWRITE_AVAILABLE=false
 # When this is empty the content of config/banner.md is used as banner
 BANNER=""
 
+# In demo mode things it is not possible for a user to change his password and his settings.
+DEMO_MODE=0
+
 ### End custom vars
\ No newline at end of file
diff --git a/config/services.yaml b/config/services.yaml
index d652dbcc..fd5e03b2 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -17,6 +17,7 @@ parameters:
     global_theme: ''            # The theme to use globally (see public/build/themes/ for choices). Set to '' for default bootstrap theme
     # Allow users to download attachments to server. Warning: This can be dangerous, because via that feature attackers maybe can access ressources on your intranet!
     allow_attachments_downloads: false
+    demo_mode: '%env(bool:DEMO_MODE)%' # If set to true, all potentially dangerous things are disabled (like changing passwords of the own user)
 
 services:
     # default configuration for services in *this* file
@@ -87,6 +88,9 @@ services:
             $allow_attachments_downloads: '%allow_attachments_downloads%'
             $mimeTypes: '@mime_types'
 
+    App\Form\UserSettingsType:
+        arguments:
+            $demo_mode: '%demo_mode%'
 
     App\EventSubscriber\TimezoneListener:
         arguments:
diff --git a/src/Controller/UserController.php b/src/Controller/UserController.php
index 8836a533..4da9e195 100644
--- a/src/Controller/UserController.php
+++ b/src/Controller/UserController.php
@@ -197,11 +197,15 @@ class UserController extends AdminPages\BaseAdminController
          * Password change form
          ****************************/
 
+        $demo_mode = $this->getParameter('demo_mode');
+
         $pw_form = $this->createFormBuilder()
             ->add('old_password', PasswordType::class, [
                 'label' => 'user.settings.pw_old.label',
+                'disabled' => $demo_mode,
                 'constraints' => [new UserPassword()], ]) //This constraint checks, if the current user pw was inputted.
             ->add('new_password', RepeatedType::class, [
+                'disabled' => $demo_mode,
                 'type' => PasswordType::class,
                 'first_options' => ['label' => 'user.settings.pw_new.label'],
                 'second_options' => ['label' => 'user.settings.pw_confirm.label'],
diff --git a/src/Form/UserSettingsType.php b/src/Form/UserSettingsType.php
index 1a9ae477..7ac6ffd6 100644
--- a/src/Form/UserSettingsType.php
+++ b/src/Form/UserSettingsType.php
@@ -6,6 +6,8 @@ use App\Entity\PriceInformations\Currency;
 use App\Entity\UserSystem\User;
 use App\Form\Type\CurrencyEntityType;
 use App\Form\Type\StructuralEntityType;
+use Doctrine\ORM\Query\Parameter;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
 use Symfony\Component\Form\Extension\Core\Type\EmailType;
@@ -26,10 +28,13 @@ class UserSettingsType extends AbstractType
 
     protected $trans;
 
-    public function __construct(Security $security, TranslatorInterface $trans)
+    protected $demo_mode;
+
+    public function __construct(Security $security, TranslatorInterface $trans, bool $demo_mode)
     {
         $this->security = $security;
         $this->trans = $trans;
+        $this->demo_mode = $demo_mode;
     }
 
     public function buildForm(FormBuilderInterface $builder, array $options)
@@ -37,29 +42,30 @@ class UserSettingsType extends AbstractType
         $builder
             ->add('name', TextType::class, [
                 'label' => $this->trans->trans('user.username.label'),
-                'disabled' => !$this->security->isGranted('edit_username', $options['data']),
+                'disabled' => !$this->security->isGranted('edit_username', $options['data']) || $this->demo_mode,
             ])
             ->add('first_name', TextType::class, [
                 'required' => false,
                 'label' => $this->trans->trans('user.firstName.label'),
-                'disabled' => !$this->security->isGranted('edit_infos', $options['data']),
+                'disabled' => !$this->security->isGranted('edit_infos', $options['data']) || $this->demo_mode,
             ])
             ->add('last_name', TextType::class, [
                 'required' => false,
                 'label' => $this->trans->trans('user.lastName.label'),
-                'disabled' => !$this->security->isGranted('edit_infos', $options['data']),
+                'disabled' => !$this->security->isGranted('edit_infos', $options['data']) || $this->demo_mode,
             ])
             ->add('department', TextType::class, [
                 'required' => false,
                 'label' => $this->trans->trans('user.department.label'),
-                'disabled' => !$this->security->isGranted('edit_infos', $options['data']),
+                'disabled' => !$this->security->isGranted('edit_infos', $options['data']) || $this->demo_mode,
             ])
             ->add('email', EmailType::class, [
                 'required' => false,
                 'label' => $this->trans->trans('user.email.label'),
-                'disabled' => !$this->security->isGranted('edit_infos', $options['data']),
+                'disabled' => !$this->security->isGranted('edit_infos', $options['data']) || $this->demo_mode,
             ])
             ->add('language', LanguageType::class, [
+                'disabled' => $this->demo_mode,
                 'required' => false,
                 'attr' => ['class' => 'selectpicker', 'data-live-search' => true],
                 'placeholder' => $this->trans->trans('user_settings.language.placeholder'),
@@ -67,6 +73,7 @@ class UserSettingsType extends AbstractType
                 'preferred_choices' => ['en', 'de']
                 ])
             ->add('timezone', TimezoneType::class, [
+                'disabled' => $this->demo_mode,
                 'required' => false,
                 'attr' => ['class' => 'selectpicker', 'data-live-search' => true],
                 'placeholder' => $this->trans->trans('user_settings.timezone.placeholder'),
@@ -74,6 +81,7 @@ class UserSettingsType extends AbstractType
                 'preferred_choices' => ['Europe/Berlin']
                 ])
             ->add('theme', ChoiceType::class, [
+                'disabled' => $this->demo_mode,
                 'required' => false,
                 'attr' => ['class' => 'selectpicker'],
                 'choices' => User::AVAILABLE_THEMES,
@@ -84,6 +92,7 @@ class UserSettingsType extends AbstractType
                 'label' => $this->trans->trans('user.theme.label'),
                 ])
             ->add('currency', CurrencyEntityType::class, [
+                'disabled' => $this->demo_mode,
                 'required' => false,
                 'label' => $this->trans->trans('user.currency.label')
             ])