diff --git a/CHANGES.rst b/CHANGES.rst
index 85f4547b..7d4d7a88 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -6,7 +6,8 @@ Changelog
 
 - Fix bug search event restapi (#148)
   [mamico]
-
+- Use custom creator criteria to list only creators present in the catalog to avoid an empty list when using LDAP and many_users flag
+  [folix-01]
 
 5.9.3 (2025-11-24)
 ------------------
diff --git a/src/redturtle/volto/configure.zcml b/src/redturtle/volto/configure.zcml
index 00c6d078..468a1f02 100644
--- a/src/redturtle/volto/configure.zcml
+++ b/src/redturtle/volto/configure.zcml
@@ -13,6 +13,7 @@
   <include package=".browser" />
   <include package=".restapi" />
   <include package=".types" />
+  <include package=".vocabularies" />
 
   <include file="indexers.zcml" />
   <include file="monkey.zcml" />
diff --git a/src/redturtle/volto/profiles/default/registry/criteria.xml b/src/redturtle/volto/profiles/default/registry/criteria.xml
index 327be94e..2b22fce1 100644
--- a/src/redturtle/volto/profiles/default/registry/criteria.xml
+++ b/src/redturtle/volto/profiles/default/registry/criteria.xml
@@ -17,4 +17,8 @@
        <value key="group" i18n:translate="">Metadata</value>
     </records>
 
+  <records interface="plone.app.querystring.interfaces.IQueryField" prefix="plone.app.querystring.field.Creator" purge="False">
+      <value key="vocabulary">redturtle.volto.vocabularies.Creators</value>
+  </records>
+
 </registry>
diff --git a/src/redturtle/volto/upgrades.py b/src/redturtle/volto/upgrades.py
index d466f259..7120817f 100644
--- a/src/redturtle/volto/upgrades.py
+++ b/src/redturtle/volto/upgrades.py
@@ -6,11 +6,14 @@
 from plone.app.linkintegrity.handlers import getObjectsFromLinks
 from plone.app.linkintegrity.handlers import updateReferences
 from plone.app.linkintegrity.interfaces import IRetriever
+from plone.app.querystring.interfaces import IQueryField
 from plone.app.upgrade.utils import installOrReinstallProduct
 from plone.dexterity.utils import iterSchemata
+from plone.registry.interfaces import IRegistry
 from plone.restapi.behaviors import IBlocks
 from redturtle.volto.setuphandlers import remove_custom_googlebot
 from uuid import uuid4
+from zope.component import getUtility
 from zope.schema import getFields
 
 
@@ -631,6 +634,14 @@ def to_4500(context):
     portal_types["Plone Site"].behaviors = tuple(behaviors)
 
 
+def to_4501(context):
+    registry = getUtility(IRegistry)
+    settings = registry.forInterface(
+        IQueryField, prefix="plone.app.querystring.field.Creator"
+    )
+    settings.vocabulary = "redturtle.volto.vocabularies.Creators"
+
+
 def to_4600(context):
     portal_types = api.portal.get_tool(name="portal_types")
     portal_types["Plone Site"].default_view = "homepage_view"
diff --git a/src/redturtle/volto/upgrades.zcml b/src/redturtle/volto/upgrades.zcml
index f5bc6972..7a49d366 100644
--- a/src/redturtle/volto/upgrades.zcml
+++ b/src/redturtle/volto/upgrades.zcml
@@ -272,6 +272,14 @@
       destination="4500"
       handler=".upgrades.to_4500"
       />
+  <genericsetup:upgradeStep
+      title="Change vocabulary for Creator criteria"
+      description=""
+      profile="redturtle.volto:default"
+      source="4500"
+      destination="4501"
+      handler=".upgrades.to_4501"
+      />
   <genericsetup:upgradeStep
       title="Set default and immediate view for Plone Site"
       description=""
diff --git a/src/redturtle/volto/vocabularies/__init__.py b/src/redturtle/volto/vocabularies/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/src/redturtle/volto/vocabularies/configure.zcml b/src/redturtle/volto/vocabularies/configure.zcml
new file mode 100644
index 00000000..99b4d662
--- /dev/null
+++ b/src/redturtle/volto/vocabularies/configure.zcml
@@ -0,0 +1,14 @@
+<configure
+    xmlns="http://namespaces.zope.org/zope"
+    xmlns:genericsetup="http://namespaces.zope.org/genericsetup"
+    xmlns:i18n="http://namespaces.zope.org/i18n"
+    xmlns:plone="http://namespaces.plone.org/plone"
+    i18n_domain="redturtle.volto"
+    >
+
+  <utility
+      factory=".principals.CreatorsVocabulary"
+      name="redturtle.volto.vocabularies.Creators"
+      />
+
+</configure>
diff --git a/src/redturtle/volto/vocabularies/principals.py b/src/redturtle/volto/vocabularies/principals.py
new file mode 100644
index 00000000..91f0ad79
--- /dev/null
+++ b/src/redturtle/volto/vocabularies/principals.py
@@ -0,0 +1,11 @@
+from plone.app.vocabularies.catalog import KeywordsVocabulary
+from zope.interface import implementer
+from zope.schema.interfaces import IVocabularyFactory
+
+
+@implementer(IVocabularyFactory)
+class CreatorsVocabulary(KeywordsVocabulary):
+    keyword_index = "Creator"
+
+
+CreatorsVocabularyFactory = CreatorsVocabulary()