diff --git a/application/Espo/Entities/Notification.php b/application/Espo/Entities/Notification.php
index 68ea7ea6a0..01e6fba74f 100644
--- a/application/Espo/Entities/Notification.php
+++ b/application/Espo/Entities/Notification.php
@@ -65,7 +65,7 @@ class Notification extends Entity
     public const string FIELD_RELATED_PARENT = 'relatedParent';
     public const string FIELD_IS_FEATURED = 'isFeatured';
 
-    public const string GROUP_TYPE_NOTE = Notification::TYPE_NOTE;
+    public const string GROUP_TYPE_RECORD = 'Record';
     public const string GROUP_TYPE_EMAIL_RECEIVED = Notification::TYPE_EMAIL_RECEIVED;
 
     public const string DATE_ATTR_NOTE_ID = 'noteId';
diff --git a/application/Espo/Modules/Crm/Classes/AssignmentNotificators/Meeting.php b/application/Espo/Modules/Crm/Classes/AssignmentNotificators/Meeting.php
index 143a3a3ba2..1a9ed6a15a 100644
--- a/application/Espo/Modules/Crm/Classes/AssignmentNotificators/Meeting.php
+++ b/application/Espo/Modules/Crm/Classes/AssignmentNotificators/Meeting.php
@@ -115,6 +115,8 @@ class Meeting implements AssignmentNotificator
             ->setType(self::NOTIFICATION_TYPE_EVENT_ATTENDEE)
             ->setUserId($userId)
             ->setRelated(LinkParent::fromEntity($entity))
+            // Needed for notification grouping.
+            ->setRelatedParent(LinkParent::fromEntity($entity))
             ->setData([
                 'entityType' => $entity->getEntityType(),
                 'entityId' => $entity->getId(),
diff --git a/application/Espo/Tools/Notification/GroupAllService.php b/application/Espo/Tools/Notification/GroupAllService.php
index 9ff5892cd8..bd94469275 100644
--- a/application/Espo/Tools/Notification/GroupAllService.php
+++ b/application/Espo/Tools/Notification/GroupAllService.php
@@ -84,7 +84,7 @@ class GroupAllService
     {
         $collection = null;
 
-        if ($type == Notification::GROUP_TYPE_NOTE) {
+        if ($type == Notification::GROUP_TYPE_RECORD) {
             $collection = $this->getNote($groupId, $searchParams);
         } else if ($type == Notification::GROUP_TYPE_EMAIL_RECEIVED) {
             $collection = $this->getEmailReceived($searchParams);
@@ -121,7 +121,7 @@ class GroupAllService
 
         $query = $builder
             ->where([
-                Notification::FIELD_TYPE => Notification::TYPE_NOTE,
+                Notification::FIELD_TYPE => $this->recordService->getRecordGroupNoteTypes(),
                 Notification::ATTR_RELATED_PARENT_TYPE => $entityType,
                 Notification::ATTR_RELATED_PARENT_ID => $id,
             ])
@@ -181,7 +181,7 @@ class GroupAllService
 
         [$type,] = explode('_', $groupId, 2);
 
-        if ($type == Notification::GROUP_TYPE_NOTE) {
+        if ($type == Notification::GROUP_TYPE_RECORD) {
             $this->markReadNote($groupId);
 
             return;
@@ -262,7 +262,7 @@ class GroupAllService
 
         [$type,] = explode('_', $groupId, 2);
 
-        if ($type == Notification::GROUP_TYPE_NOTE) {
+        if ($type == Notification::GROUP_TYPE_RECORD) {
             $this->removeNote($groupId);
 
             return;
@@ -294,7 +294,7 @@ class GroupAllService
                 Notification::ATTR_USER_ID => $this->user->getId(),
             ])
             ->where([
-                Notification::FIELD_TYPE => Notification::TYPE_NOTE,
+                Notification::FIELD_TYPE => $this->recordService->getRecordGroupNoteTypes(),
                 Notification::ATTR_RELATED_PARENT_TYPE => $entityType,
                 Notification::ATTR_RELATED_PARENT_ID => $id,
             ])
@@ -335,7 +335,7 @@ class GroupAllService
                 Notification::ATTR_USER_ID => $this->user->getId(),
             ])
             ->where([
-                Notification::FIELD_TYPE => Notification::TYPE_NOTE,
+                Notification::FIELD_TYPE => $this->recordService->getRecordGroupNoteTypes(),
                 Notification::ATTR_RELATED_PARENT_TYPE => $entityType,
                 Notification::ATTR_RELATED_PARENT_ID => $id,
                 Notification::ATTR_READ => false,
diff --git a/application/Espo/Tools/Notification/RecordService.php b/application/Espo/Tools/Notification/RecordService.php
index 94e5912a00..7ad0e11c79 100644
--- a/application/Espo/Tools/Notification/RecordService.php
+++ b/application/Espo/Tools/Notification/RecordService.php
@@ -658,12 +658,12 @@ class RecordService
             ->buildQueryBuilder()
             ->select([
                 Selection::create(
-                    Expr::value(Notification::GROUP_TYPE_NOTE),
+                    Expr::value(Notification::GROUP_TYPE_RECORD),
                     self::COLUMN_GROUP_TYPE
                 ),
                 Selection::create(
                     Expr::concat(
-                        Expr::value(Notification::GROUP_TYPE_NOTE),
+                        Expr::value(Notification::GROUP_TYPE_RECORD),
                         Expr::value('_'),
                         Expr::column(Notification::ATTR_RELATED_PARENT_TYPE),
                         Expr::value('_'),
@@ -719,7 +719,7 @@ class RecordService
             ])
             ->where([
                 Notification::ATTR_RELATED_PARENT_ID . '!=' => null,
-                Notification::FIELD_TYPE => Notification::TYPE_NOTE,
+                Notification::FIELD_TYPE => $this->getRecordGroupNoteTypes(),
             ])
             ->where([Notification::ATTR_USER_ID => $user->getId()])
             ->group(Notification::ATTR_RELATED_PARENT_ID)
@@ -889,7 +889,7 @@ class RecordService
             ->where([
                 [
                     'OR' => [
-                        Notification::FIELD_TYPE . '!=' => Notification::TYPE_NOTE,
+                        Notification::FIELD_TYPE . '!=' => $this->getRecordGroupNoteTypes(),
                         Notification::ATTR_RELATED_PARENT_ID => null,
                     ],
                 ],
@@ -914,4 +914,17 @@ class RecordService
     {
         return Expr::max(Expr::column(Notification::ATTR_NUMBER));
     }
+
+    /**
+     * @internal
+     * @return string[]
+     */
+    public function getRecordGroupNoteTypes(): array
+    {
+        return [
+            Notification::TYPE_NOTE,
+            Notification::TYPE_USER_REACTION,
+            'EventAttendee',
+        ];
+    }
 }
diff --git a/client/src/views/notification/fields/container.js b/client/src/views/notification/fields/container.js
index 5fca5d9232..a58516426e 100644
--- a/client/src/views/notification/fields/container.js
+++ b/client/src/views/notification/fields/container.js
@@ -136,7 +136,7 @@ class NotificationContainerFieldView extends BaseFieldView {
 
         let viewName;
 
-        if (groupType === 'Note') {
+        if (groupType === 'Record') {
             viewName = 'views/notification/items/group-note';
         } else if (groupType === 'EmailReceived') {
             viewName = 'views/notification/items/group-email-received';