diff --git a/src/settings/components/ExternalDataSourcesConfig/ExternalDataSourcesLookup/ExternalDataSourcesLookup.js b/src/settings/components/ExternalDataSourcesConfig/ExternalDataSourcesLookup/ExternalDataSourcesLookup.js
index f1fe77d..180bc13 100644
--- a/src/settings/components/ExternalDataSourcesConfig/ExternalDataSourcesLookup/ExternalDataSourcesLookup.js
+++ b/src/settings/components/ExternalDataSourcesConfig/ExternalDataSourcesLookup/ExternalDataSourcesLookup.js
@@ -4,7 +4,7 @@ import { FormattedMessage } from 'react-intl';
 import arrayMutators from 'final-form-arrays';
 import { FormModal } from '@k-int/stripes-kint-components';
 
-import { MultiColumnList, Pane, PaneHeader, Button } from '@folio/stripes/components';
+import { MessageBanner, MultiColumnList, Pane, PaneHeader, Button } from '@folio/stripes/components';
 import { useStripes } from '@folio/stripes/core';
 import ExternalDataSourcesForm from '../ExternalDataSourcesForm/ExternalDataSourcesForm';
 
@@ -19,6 +19,16 @@ const ExternalDataSourcesLookup = ({
   const count = externalKbs?.length ?? 0;
   const [createEDS, setCreateEDS] = useState(false);
 
+  const gokbCount = (externalKbs || []).filter(kb => kb?.active && kb?.type === 'org.olf.kb.adapters.GOKbOAIAdapter').length;
+
+  const messageBanner = gokbCount > 1 && (
+    <MessageBanner icon={null} type="warning">
+      <FormattedMessage
+        id="ui-local-kb-admin.settings.externalDataSources.warn.multipleKbs"
+      />
+    </MessageBanner>
+  );
+
   const renderSettingsHeader = renderProps => (
     <PaneHeader
       {...renderProps}
@@ -46,6 +56,7 @@ const ExternalDataSourcesLookup = ({
         id="settings-external-data-sources"
         renderHeader={renderSettingsHeader}
       >
+        {messageBanner}
         <MultiColumnList
           columnMapping={{
             name: <FormattedMessage id="ui-local-kb-admin.settings.externalDataSources.name" />,
diff --git a/translations/ui-local-kb-admin/en.json b/translations/ui-local-kb-admin/en.json
index 7c58ce2..c6c18f7 100644
--- a/translations/ui-local-kb-admin/en.json
+++ b/translations/ui-local-kb-admin/en.json
@@ -161,6 +161,7 @@
   "settings.externalDataSources.callout.delete.success": "External data source successfully deleted.",
   "settings.externalDataSources.callout.delete.error": "There was an error deleting the external data source.{error}",
   "settings.externalDataSources.nameExists": "This name already exists",
+  "settings.externalDataSources.warn.multipleKbs": "<strong>Warning</strong>: More than one active GOKB data source exists. It is recommended to have a single active GOKB configured. The first active source in the table (listed alphabetically) will be used for the Agreements GOKB search.",
   "cancel": "Cancel",
   "saveAndClose": "Save & close",
   "yes": "Yes",