diff --git a/mayan/apps/metadata/classes.py b/mayan/apps/metadata/classes.py
index 3d16e79cdb..08bd9a5d03 100644
--- a/mayan/apps/metadata/classes.py
+++ b/mayan/apps/metadata/classes.py
@@ -29,7 +29,10 @@ class MetadataLookup(object):
     def get_as_context(cls):
         result = {}
         for entry in cls._registry:
-            result[entry.name] = entry.value
+            try:
+                result[entry.name] = entry.value()
+            except TypeError:
+                result[entry.name] = entry.value
 
         return result
 
diff --git a/mayan/apps/user_management/apps.py b/mayan/apps/user_management/apps.py
index b01334daa4..992b11dc9c 100644
--- a/mayan/apps/user_management/apps.py
+++ b/mayan/apps/user_management/apps.py
@@ -22,6 +22,14 @@ from .links import (
 )
 
 
+def get_groups():
+    return ','.join([group.name for group in Group.objects.all()])
+
+
+def get_users():
+    return ','.join([user.get_full_name() or user.username for user in get_user_model().objects.all()])
+
+
 class UserManagementApp(MayanAppConfig):
     app_url = 'accounts'
     name = 'user_management'
@@ -36,12 +44,12 @@ class UserManagementApp(MayanAppConfig):
         APIEndPoint(app=self, version_string='1')
 
         MetadataLookup(
-            description=_('All the groups.'), name='group',
-            value=Group.objects.all()
+            description=_('All the groups.'), name='groups',
+            value=get_groups
         )
         MetadataLookup(
             description=_('All the users.'), name='users',
-            value=User.objects.all()
+            value=get_users
         )
 
         SourceColumn(
diff --git a/mayan/apps/user_management/tests/test_views.py b/mayan/apps/user_management/tests/test_views.py
index 6e7ce52595..ff931c096a 100644
--- a/mayan/apps/user_management/tests/test_views.py
+++ b/mayan/apps/user_management/tests/test_views.py
@@ -1,8 +1,17 @@
 from __future__ import unicode_literals
 
 from django.contrib.auth import get_user_model
+from django.contrib.auth.models import Group
 
 from common.tests.test_views import GenericViewTestCase
+from documents.tests.test_views import GenericDocumentViewTestCase
+
+from metadata.models import MetadataType
+from metadata.permissions import permission_metadata_document_edit
+
+from metadata.tests.literals import (
+    TEST_METADATA_TYPE_LABEL, TEST_METADATA_TYPE_NAME,
+)
 
 from ..permissions import (
     permission_user_delete, permission_user_edit, permission_user_view
@@ -179,3 +188,58 @@ class UserManagementViewTestCase(GenericViewTestCase):
 
         self.assertContains(response, text='deleted', status_code=200)
         self.assertEqual(get_user_model().objects.count(), 2)
+
+
+class MetadataLookupIntegrationTestCase(GenericDocumentViewTestCase):
+    def setUp(self):
+        super(MetadataLookupIntegrationTestCase, self).setUp()
+
+        self.metadata_type = MetadataType.objects.create(
+            name=TEST_METADATA_TYPE_NAME, label=TEST_METADATA_TYPE_LABEL
+        )
+
+        self.document_type.metadata.create(metadata_type=self.metadata_type)
+
+    def test_user_list_lookup_render(self):
+        self.login(
+            username=TEST_USER_USERNAME, password=TEST_USER_PASSWORD
+        )
+
+        self.metadata_type.lookup = '{{ users }}'
+        self.metadata_type.save()
+        self.document.metadata.create(metadata_type=self.metadata_type)
+        self.role.permissions.add(
+            permission_metadata_document_edit.stored_permission
+        )
+
+        response = self.get(
+            viewname='metadata:metadata_edit', args=(self.document.pk,)
+        )
+
+        self.assertContains(
+            response, text='<option value="{}">{}</option>'.format(
+                TEST_USER_USERNAME, TEST_USER_USERNAME
+            ), status_code=200
+        )
+
+    def test_group_list_lookup_render(self):
+        self.login(
+            username=TEST_USER_USERNAME, password=TEST_USER_PASSWORD
+        )
+
+        self.metadata_type.lookup = '{{ groups }}'
+        self.metadata_type.save()
+        self.document.metadata.create(metadata_type=self.metadata_type)
+        self.role.permissions.add(
+            permission_metadata_document_edit.stored_permission
+        )
+
+        response = self.get(
+            viewname='metadata:metadata_edit', args=(self.document.pk,)
+        )
+
+        self.assertContains(
+            response, text='<option value="{}">{}</option>'.format(
+                Group.objects.first().name, Group.objects.first().name
+            ), status_code=200
+        )