diff --git a/modules/entity_hierarchy_microsite/src/Entity/Microsite.php b/modules/entity_hierarchy_microsite/src/Entity/Microsite.php
index ad10268..285d9d3 100644
--- a/modules/entity_hierarchy_microsite/src/Entity/Microsite.php
+++ b/modules/entity_hierarchy_microsite/src/Entity/Microsite.php
@@ -7,6 +7,8 @@ use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Field\BaseFieldDefinition;
 use Drupal\entity_hierarchy_microsite\EntityHooks;
+use Drupal\node\Entity\Node as DrupalNode;
+use PNX\NestedSet\Node;
 
 /**
  * Defines a class for a microsite entity.
@@ -57,7 +59,7 @@ class Microsite extends ContentEntityBase implements MicrositeInterface {
   /**
    * {@inheritdoc}
    */
-  public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
+  public static function baseFieldDefinitions(EntityTypeInterface $entity_type): array {
     $fields = parent::baseFieldDefinitions($entity_type);
 
     $fields['name'] = BaseFieldDefinition::create('string')
@@ -99,7 +101,7 @@ class Microsite extends ContentEntityBase implements MicrositeInterface {
         'weight' => -5,
       ])
       ->setDisplayOptions('form', [
-        'type' => 'checkbox',
+        'type' => 'boolean_checkbox',
         'weight' => -5,
       ])
       ->setDisplayConfigurable('view', TRUE)
@@ -144,6 +146,13 @@ class Microsite extends ContentEntityBase implements MicrositeInterface {
     return (bool) $this->get('generate_menu')->value;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function modifyMenuPluginDefinition(Node $treeNode, DrupalNode $node, array $definition, Node $homeNode): array {
+    return $definition;
+  }
+
   /**
    * {@inheritdoc}
    */
diff --git a/modules/entity_hierarchy_microsite/src/Entity/MicrositeInterface.php b/modules/entity_hierarchy_microsite/src/Entity/MicrositeInterface.php
index 6b72b03..94fdc33 100644
--- a/modules/entity_hierarchy_microsite/src/Entity/MicrositeInterface.php
+++ b/modules/entity_hierarchy_microsite/src/Entity/MicrositeInterface.php
@@ -3,6 +3,8 @@
 namespace Drupal\entity_hierarchy_microsite\Entity;
 
 use Drupal\Core\Entity\ContentEntityInterface;
+use Drupal\node\Entity\Node as DrupalNode;
+use PNX\NestedSet\Node;
 
 /**
  * Defines an interface for microsites.
@@ -33,4 +35,22 @@ interface MicrositeInterface extends ContentEntityInterface {
    */
   public function shouldGenerateMenu();
 
+  /**
+   * Allows a microsite sub-class to modify plugin definitions.
+   *
+   * @param \PNX\NestedSet\Node $treeNode
+   *   Tree node for this menu plugin definition.
+   * @param \Drupal\node\Entity\Node $node
+   *   Drupal node for the menu plugin definition.
+   * @param array $definition
+   *   Menu plugin definition. This should be modified and returned.
+   * @param \PNX\NestedSet\Node $homeNode
+   *   Tree node for the microsite home.
+   *
+   * @return array
+   *   Modified menu plugin definition. To prevent the menu link from being
+   *   created, return an empty array.
+   */
+  public function modifyMenuPluginDefinition(Node $treeNode, DrupalNode $node, array $definition, Node $homeNode): array;
+
 }
diff --git a/modules/entity_hierarchy_microsite/src/MicrositeMenuLinkDiscovery.php b/modules/entity_hierarchy_microsite/src/MicrositeMenuLinkDiscovery.php
index 2b720c5..dd875b3 100644
--- a/modules/entity_hierarchy_microsite/src/MicrositeMenuLinkDiscovery.php
+++ b/modules/entity_hierarchy_microsite/src/MicrositeMenuLinkDiscovery.php
@@ -149,7 +149,7 @@ class MicrositeMenuLinkDiscovery implements MicrositeMenuLinkDiscoveryInterface
           $revisionKey = sprintf('%s:%s', $treeNode->getId(), $treeNode->getRevisionId());
           $itemUuid = $item->uuid();
           $parentUuids[$revisionKey] = $itemUuid;
-          $definitions[$itemUuid] = [
+          if ($definition = $microsite->modifyMenuPluginDefinition($treeNode, $item, [
             'class' => MicrositeMenuItem::class,
             'menu_name' => 'entity-hierarchy-microsite',
             'route_name' => $url->getRouteName(),
@@ -169,10 +169,12 @@ class MicrositeMenuLinkDiscovery implements MicrositeMenuLinkDiscoveryInterface
             'provider' => 'entity_hierarchy_microsite',
             'discovered' => 1,
             'parent' => 'entity_hierarchy_microsite:' . $home->uuid(),
-          ];
-          $parent = $tree->findParent($treeNode->getNodeKey());
-          if ($parent && ($parentRevisionKey = sprintf('%s:%s', $parent->getId(), $parent->getRevisionId())) && array_key_exists($parentRevisionKey, $parentUuids)) {
-            $definitions[$itemUuid]['parent'] = 'entity_hierarchy_microsite:' . $parentUuids[$parentRevisionKey];
+          ], $homeNode)) {
+            $definitions[$itemUuid] = $definition;
+            $parent = $tree->findParent($treeNode->getNodeKey());
+            if ($parent && ($parentRevisionKey = sprintf('%s:%s', $parent->getId(), $parent->getRevisionId())) && array_key_exists($parentRevisionKey, $parentUuids)) {
+              $definitions[$itemUuid]['parent'] = 'entity_hierarchy_microsite:' . $parentUuids[$parentRevisionKey];
+            }
           }
         }
       }
diff --git a/modules/entity_hierarchy_microsite/tests/modules/entity_hierarchy_microsite_test/entity_hierarchy_microsite_test.module b/modules/entity_hierarchy_microsite/tests/modules/entity_hierarchy_microsite_test/entity_hierarchy_microsite_test.module
index ec5e350..e47ea0f 100644
--- a/modules/entity_hierarchy_microsite/tests/modules/entity_hierarchy_microsite_test/entity_hierarchy_microsite_test.module
+++ b/modules/entity_hierarchy_microsite/tests/modules/entity_hierarchy_microsite_test/entity_hierarchy_microsite_test.module
@@ -8,6 +8,7 @@
 use Drupal\Core\Url;
 use Drupal\entity_hierarchy_microsite\Entity\MicrositeMenuItemOverrideInterface;
 use Drupal\entity_hierarchy_microsite\Plugin\Menu\MicrositeMenuItem;
+use Drupal\entity_hierarchy_microsite_test\Entity\CustomMicrosite;
 
 /**
  * Implements hook_entity_hierarchy_microsite_links_alter().
@@ -25,3 +26,12 @@ function entity_hierarchy_microsite_test_entity_hierarchy_microsite_menu_item_ur
   $attributes['data-some-data'] = 'some-data';
   $url->setOption('attributes', $attributes);
 }
+
+/**
+ * Implements hook_entity_bundle_info_alter().
+ */
+function entity_hierarchy_microsite_test_entity_bundle_info_alter(&$bundles) {
+  if (isset($bundles['entity_hierarchy_microsite']['entity_hierarchy_microsite'])) {
+    $bundles['entity_hierarchy_microsite']['entity_hierarchy_microsite']['class'] = CustomMicrosite::class;
+  }
+}
diff --git a/modules/entity_hierarchy_microsite/tests/src/Kernel/MicrositeMenuItemsTest.php b/modules/entity_hierarchy_microsite/tests/src/Kernel/MicrositeMenuItemsTest.php
index e389eab..67c27c3 100644
--- a/modules/entity_hierarchy_microsite/tests/src/Kernel/MicrositeMenuItemsTest.php
+++ b/modules/entity_hierarchy_microsite/tests/src/Kernel/MicrositeMenuItemsTest.php
@@ -16,6 +16,7 @@ class MicrositeMenuItemsTest extends EntityHierarchyMicrositeKernelTestBase {
    * Tests the microsite menu link integration.
    */
   public function testMicrositeMenuLinkDerivation() {
+    \Drupal::state()->set('entity_hierarchy_microsite_max_depth', 2);
     $media = $this->createImageMedia();
     $children = $this->createChildEntities($this->parent->id(), 5);
     list ($first, $second) = array_values($children);
@@ -26,6 +27,8 @@ class MicrositeMenuItemsTest extends EntityHierarchyMicrositeKernelTestBase {
       'home' => $this->parent,
       'logo' => $media,
     ]);
+    $last_second_child = end($second_children);
+    $too_deep = $this->createChildEntities($last_second_child->id(), 4, '2.4.');
     $microsite->save();
     // There should be no menus generated.
     /** @var \Drupal\Core\Menu\MenuLinkTreeInterface $tree */
@@ -61,6 +64,9 @@ class MicrositeMenuItemsTest extends EntityHierarchyMicrositeKernelTestBase {
         $this->assertCount(4, $items[$plugin_id]->subtree[$child_plugin_id]->subtree);
         foreach ($second_children as $child_entity) {
           $this->assertArrayHasKey('entity_hierarchy_microsite:' . $child_entity->uuid(), $items[$plugin_id]->subtree[$child_plugin_id]->subtree);
+          if ($child_entity->uuid() === $last_second_child->uuid()) {
+            $this->assertEmpty($items[$plugin_id]->subtree[$child_plugin_id]->subtree['entity_hierarchy_microsite:' . $child_entity->uuid()]->subtree);
+          }
         }
       }
     }