diff --git a/apps/orgs/api.py b/apps/orgs/api.py
index e7c83fa36..0b63eeabf 100644
--- a/apps/orgs/api.py
+++ b/apps/orgs/api.py
@@ -2,14 +2,12 @@
 #
 
 from django.utils.translation import ugettext as _
-from django.db.models import Q
-from rest_framework import status, generics
+from rest_framework import status
 from rest_framework.views import Response
 from rest_framework_bulk import BulkModelViewSet
-from rest_framework.mixins import CreateModelMixin
 
 from common.permissions import IsSuperUserOrAppUser
-from common.drf.api import JMSBulkRelationModelViewSet
+from common.drf.api import JMSBulkRelationModelViewSet, JMSModelViewSet
 from .models import Organization, ROLE
 from .serializers import (
     OrgSerializer, OrgReadSerializer,
diff --git a/apps/orgs/models.py b/apps/orgs/models.py
index b244ddec4..5fb2d7ba6 100644
--- a/apps/orgs/models.py
+++ b/apps/orgs/models.py
@@ -305,7 +305,7 @@ class OrgMemeberManager(models.Manager):
                        model=User, pk_set=_users2pks(users, admins, auditors), using=self.db)
 
         send(action='pre_add')
-        self.bulk_create(oms_add)
+        self.bulk_create(oms_add, ignore_conflicts=True)
         send(action='post_add')
 
     def _get_remove_add_set(self, new_users, old_users):
diff --git a/apps/perms/api/user_permission/user_permission_nodes_with_assets.py b/apps/perms/api/user_permission/user_permission_nodes_with_assets.py
index ae9f00536..3829f0beb 100644
--- a/apps/perms/api/user_permission/user_permission_nodes_with_assets.py
+++ b/apps/perms/api/user_permission/user_permission_nodes_with_assets.py
@@ -43,6 +43,7 @@ class MyGrantedNodesWithAssetsAsTreeApi(SerializeToTreeNodeMixin, ListAPIView):
         all_nodes = get_user_granted_nodes_list_via_mapping_node(user)
         all_assets = get_user_granted_all_assets(user)
         all_assets = all_assets.annotate(parent_key=F('nodes__key'))
+        all_assets = all_assets.prefetch_related('platform')
 
         data = [
             *self.serialize_nodes(all_nodes, with_asset_amount=True),
diff --git a/apps/users/api/user.py b/apps/users/api/user.py
index ebf652117..42cfa0f04 100644
--- a/apps/users/api/user.py
+++ b/apps/users/api/user.py
@@ -17,7 +17,7 @@ from common.utils import get_logger
 from orgs.utils import current_org
 from orgs.models import ROLE as ORG_ROLE, OrganizationMember
 from .. import serializers
-from ..serializers import UserSerializer, UserRetrieveSerializer, MiniUserSerializer
+from ..serializers import UserSerializer, UserRetrieveSerializer, MiniUserSerializer, InviteSerializer
 from .mixins import UserQuerysetMixin
 from ..models import User
 from ..signals import post_user_create
@@ -38,7 +38,8 @@ class UserViewSet(CommonApiMixin, UserQuerysetMixin, BulkModelViewSet):
     serializer_classes = {
         'default': UserSerializer,
         'retrieve': UserRetrieveSerializer,
-        'suggestion': MiniUserSerializer
+        'suggestion': MiniUserSerializer,
+        'invite': InviteSerializer,
     }
     extra_filter_backends = [OrgRoleUserFilterBackend]
 
@@ -118,7 +119,7 @@ class UserViewSet(CommonApiMixin, UserQuerysetMixin, BulkModelViewSet):
             self.check_object_permissions(self.request, user)
         return super().perform_bulk_update(serializer)
 
-    @action(methods=['get'], detail=False, permission_classes=(IsOrgAdminOrAppUser,))
+    @action(methods=['get'], detail=False, permission_classes=(IsOrgAdmin,))
     def suggestion(self, request):
         queryset = User.objects.exclude(role=User.ROLE.APP)
         queryset = self.filter_queryset(queryset)
@@ -132,6 +133,25 @@ class UserViewSet(CommonApiMixin, UserQuerysetMixin, BulkModelViewSet):
         serializer = self.get_serializer(queryset, many=True)
         return Response(serializer.data)
 
+    @action(methods=['post'], detail=False, permission_classes=(IsOrgAdmin,))
+    def invite(self, request):
+        data = request.data
+        if not isinstance(data, list):
+            data = [request.data]
+        if not current_org or not current_org.is_real():
+            error = {"error": "Not a valid org"}
+            return Response(error, status=400)
+
+        serializer_cls = self.get_serializer_class()
+        serializer = serializer_cls(data=data, many=True)
+        serializer.is_valid(raise_exception=True)
+        validated_data = serializer.validated_data
+        for i in validated_data:
+            i['org_id'] = current_org.org_id()
+        relations = [OrganizationMember(**i) for i in validated_data]
+        OrganizationMember.objects.bulk_create(relations, ignore_conflicts=True)
+        return Response(serializer.data, status=201)
+
 
 class UserChangePasswordApi(UserQuerysetMixin, generics.RetrieveUpdateAPIView):
     permission_classes = (IsOrgAdmin,)
diff --git a/apps/users/serializers/user.py b/apps/users/serializers/user.py
index ccb269350..af2cf596d 100644
--- a/apps/users/serializers/user.py
+++ b/apps/users/serializers/user.py
@@ -8,9 +8,8 @@ from rest_framework import serializers
 from common.utils import validate_ssh_public_key
 from common.mixins import CommonBulkSerializerMixin
 from common.permissions import CanUpdateDeleteUser
-from common.drf.fields import GroupConcatedPrimaryKeyRelatedField
 from orgs.models import ROLE as ORG_ROLE
-from ..models import User, UserGroup
+from ..models import User
 
 
 __all__ = [
@@ -18,7 +17,7 @@ __all__ = [
     'ChangeUserPasswordSerializer', 'ResetOTPSerializer',
     'UserProfileSerializer', 'UserOrgSerializer',
     'UserUpdatePasswordSerializer', 'UserUpdatePublicKeySerializer',
-    'UserRetrieveSerializer', 'MiniUserSerializer',
+    'UserRetrieveSerializer', 'MiniUserSerializer', 'InviteSerializer'
 ]
 
 
@@ -339,3 +338,10 @@ class MiniUserSerializer(serializers.ModelSerializer):
     class Meta:
         model = User
         fields = ['id', 'name', 'username']
+
+
+class InviteSerializer(serializers.Serializer):
+    user = serializers.PrimaryKeyRelatedField(
+        queryset=User.objects.exclude(role=User.ROLE.APP)
+    )
+    role = serializers.ChoiceField(choices=ORG_ROLE.choices)