diff --git a/src/Controller/Admin/User/EditController.php b/src/Controller/Admin/User/EditController.php
index 90b8f43..fadba8d 100644
--- a/src/Controller/Admin/User/EditController.php
+++ b/src/Controller/Admin/User/EditController.php
@@ -45,6 +45,7 @@ class EditController extends AbstractController
                 return $this->render('admin/user/modal_edit.html.twig', [
                     'user' => $user,
                     'form' => $form,
+                    'syncedRoles' => Role::syncedOnly($user->getRoles()),
                 ]);
             }
 
@@ -66,6 +67,7 @@ class EditController extends AbstractController
         return $this->render('admin/user/modal_edit.html.twig', [
             'user' => $user,
             'form' => $form,
+            'syncedRoles' => Role::syncedOnly($user->getRoles()),
         ]);
     }
 
diff --git a/src/Form/Admin/UserType.php b/src/Form/Admin/UserType.php
index 8cf0b53..293b976 100644
--- a/src/Form/Admin/UserType.php
+++ b/src/Form/Admin/UserType.php
@@ -12,10 +12,12 @@ use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 
 /**
- * Lets an administrator assign roles and hotel codes to an existing account.
+ * Lets an administrator assign the privileged roles and the hotel codes of an existing account.
  *
- * This is the only way those two get changed after the account was created — BpnAuthenticator
- * imports them once and never touches them again.
+ * Only Role::PRIVILEGED is offered: the remaining roles are synced from the BusPro CRM on every
+ * login (see BpnAuthenticator), so editing them here would be undone at the user's next login.
+ * Hotel codes are seeded once at account creation, which makes this form the only way to change
+ * them afterwards.
  *
  * @extends AbstractType<User>
  */
@@ -35,14 +37,16 @@ class UserType extends AbstractType
         $builder
             ->add('roles', ChoiceType::class, [
                 'label' => 'Rollen',
-                'choices' => array_flip(Role::labels()),
+                'choices' => $this->privilegedChoices(),
                 'multiple' => true,
                 'expanded' => true,
                 'required' => false,
-                // User::getRoles() prepends the implicit ROLE_USER, which must not be written back.
-                'getter' => static fn (User $user): array => array_values(array_diff($user->getRoles(), ['ROLE_USER'])),
+                'help' => 'Alle übrigen Rollen kommen bei jeder Anmeldung aus BusPro und lassen sich hier nicht ändern.',
+                // Only the administrator-granted half is editable; the synced half is preserved,
+                // as is the implicit ROLE_USER, which must never be written back.
+                'getter' => static fn (User $user): array => Role::privilegedOnly($user->getRoles()),
                 'setter' => static function (User $user, array $roles): void {
-                    $user->setRoles(array_values(array_unique($roles)));
+                    $user->setRoles(Role::combine($user->getRoles(), $roles));
                 },
             ])
             ->add('hotelCodes', ChoiceType::class, [
@@ -58,6 +62,14 @@ class UserType extends AbstractType
         ;
     }
 
+    /**
+     * @return array<string, string> label => role
+     */
+    private function privilegedChoices(): array
+    {
+        return array_flip(array_intersect_key(Role::labels(), array_flip(Role::PRIVILEGED)));
+    }
+
     /**
      * Codes already stored on the account are always offered, even when they are missing from
      * the configured catalog — otherwise saving the form would silently drop them.
diff --git a/templates/admin/user/modal_edit.html.twig b/templates/admin/user/modal_edit.html.twig
index 8e3e7d8..3342d39 100644
--- a/templates/admin/user/modal_edit.html.twig
+++ b/templates/admin/user/modal_edit.html.twig
@@ -9,6 +9,9 @@
     <div class="pb-4 text-sm text-gray-500">
         {{ user.email }}
     </div>
+    <div class="pb-4 text-sm text-gray-500">
+        aus BusPro: {{ syncedRoles | map_roles | join(', ') | default('–') }}
+    </div>
     {{ form_start(form) }}
     <div class="grid lg:grid-cols-2 gap-y-4 lg:gap-x-8">
         {{ form_row(form.roles) }}
diff --git a/tests/Form/Admin/UserTypeTest.php b/tests/Form/Admin/UserTypeTest.php
index da491a9..77bf37d 100644
--- a/tests/Form/Admin/UserTypeTest.php
+++ b/tests/Form/Admin/UserTypeTest.php
@@ -13,29 +13,37 @@ use Symfony\Component\Form\Forms;
 
 class UserTypeTest extends TestCase
 {
-    public function testStoredRolesArePreselectedWithoutTheImplicitRoleUser(): void
+    public function testOnlyThePrivilegedRolesArePreselected(): void
     {
-        $user = (new User('teamer@example.org'))->setRoles([Role::TEAMER]);
+        $user = (new User('teamer@example.org'))->setRoles([Role::TEAMER, Role::GROUPS_MANAGER]);
 
-        self::assertSame([Role::TEAMER], $this->createForm($user)->get('roles')->getData());
+        self::assertSame([Role::GROUPS_MANAGER], $this->createForm($user)->get('roles')->getData());
     }
 
-    public function testSubmittingRolesDoesNotStoreTheImplicitRoleUser(): void
+    public function testOnlyPrivilegedRolesAreOffered(): void
+    {
+        $choices = $this->createForm(new User('teamer@example.org'))->get('roles')->getConfig()->getOption('choices');
+
+        // The rest is synced from BusPro on every login and would be overwritten right away.
+        self::assertSame(Role::PRIVILEGED, array_values($choices));
+    }
+
+    public function testSubmittingRolesKeepsTheSyncedOnesAndNotTheImplicitRoleUser(): void
     {
         $user = (new User('teamer@example.org'))->setRoles([Role::TEAMER]);
 
         $form = $this->createForm($user);
-        $form->submit(['roles' => [Role::TEAMER, Role::GROUPS_MANAGER], 'hotelCodes' => []]);
+        $form->submit(['roles' => [Role::GROUPS_MANAGER], 'hotelCodes' => []]);
 
         self::assertTrue($form->isSynchronized());
         // getRoles() prepends ROLE_USER; it must not have been persisted a second time.
         self::assertSame(['ROLE_USER', Role::TEAMER, Role::GROUPS_MANAGER], $user->getRoles());
     }
 
-    public function testClearingEveryCheckboxEmptiesTheAssignment(): void
+    public function testClearingEveryCheckboxKeepsTheSyncedRoles(): void
     {
         $user = (new User('teamer@example.org'))
-            ->setRoles([Role::TEAMER])
+            ->setRoles([Role::TEAMER, Role::GROUPS_MANAGER])
             ->setHotelCodes(['SSL'])
         ;
 
@@ -43,7 +51,7 @@ class UserTypeTest extends TestCase
         $form->submit([]);
 
         self::assertTrue($form->isSynchronized());
-        self::assertSame(['ROLE_USER'], $user->getRoles());
+        self::assertSame(['ROLE_USER', Role::TEAMER], $user->getRoles());
         self::assertSame([], $user->getHotelCodes());
     }