diff --git a/cvat-ui/src/components/organization-page/member-item.tsx b/cvat-ui/src/components/organization-page/member-item.tsx
index a52d9661233..506bc75ad0f 100644
--- a/cvat-ui/src/components/organization-page/member-item.tsx
+++ b/cvat-ui/src/components/organization-page/member-item.tsx
@@ -41,7 +41,7 @@ function MemberItem(props: Props): JSX.Element {
     const { username, firstName, lastName } = user;
     const { username: selfUserName } = useSelector((state: CombinedState) => state.auth.user);
 
-    const invitationActionsMenu = (
+    const invitationActionsMenu = invitation && (
         <Dropdown overlay={(
             <Menu onClick={(action: MenuInfo) => {
                 if (action.key === MenuKeys.RESEND_INVITATION) {
diff --git a/cvat/apps/iam/rules/memberships.rego b/cvat/apps/iam/rules/memberships.rego
index ce0ba9225fb..497b6fe58eb 100644
--- a/cvat/apps/iam/rules/memberships.rego
+++ b/cvat/apps/iam/rules/memberships.rego
@@ -53,6 +53,10 @@ filter := [] { # Django Q object to filter list of entries
     utils.is_admin
     org_id := input.auth.organization.id
     qobject := [ {"organization": org_id} ]
+} else := qobject {
+    organizations.is_staff
+    org_id := input.auth.organization.id
+    qobject := [ {"organization": org_id} ]
 } else := qobject {
     org_id := input.auth.organization.id
     qobject := [ {"organization": org_id}, {"is_active": true}, "&" ]
@@ -65,6 +69,12 @@ allow {
     input.resource.user.id == input.auth.user.id
 }
 
+allow {
+    input.scope == utils.VIEW
+    organizations.is_staff
+    input.resource.organization.id == input.auth.organization.id
+}
+
 allow {
     input.scope == utils.VIEW
     input.resource.is_active
@@ -76,7 +86,6 @@ allow {
 # himself/another maintainer/owner
 allow {
     { utils.CHANGE_ROLE, utils.DELETE }[input.scope]
-    input.resource.is_active
     input.resource.organization.id == input.auth.organization.id
     utils.has_perm(utils.USER)
     organizations.is_maintainer
@@ -91,7 +100,6 @@ allow {
 # owner of the organization can change the role of any member and remove any member except himself
 allow {
     { utils.CHANGE_ROLE, utils.DELETE }[input.scope]
-    input.resource.is_active
     input.resource.organization.id == input.auth.organization.id
     utils.has_perm(utils.USER)
     organizations.is_owner
diff --git a/cvat/apps/iam/rules/tests/generators/memberships_test.gen.rego.py b/cvat/apps/iam/rules/tests/generators/memberships_test.gen.rego.py
index 6510084dcd6..7cf9cfca255 100644
--- a/cvat/apps/iam/rules/tests/generators/memberships_test.gen.rego.py
+++ b/cvat/apps/iam/rules/tests/generators/memberships_test.gen.rego.py
@@ -98,6 +98,16 @@ def eval_rule(scope, context, ownership, privilege, membership, data):
         return False
 
     if scope != "create" and not data["resource"]["is_active"]:
+        is_staff = membership == "owner" or membership == 'maintainer'
+        if is_staff:
+            if scope != 'view':
+                if ORG_ROLES.index(membership) >= ORG_ROLES.index(resource["role"]):
+                    return False
+                if GROUPS.index(privilege) > GROUPS.index("user"):
+                    return False
+                if resource["user"]['id'] == data["auth"]["user"]['id']:
+                    return False
+            return True
         return False
 
     return bool(rules)
diff --git a/cvat/apps/organizations/serializers.py b/cvat/apps/organizations/serializers.py
index 25b37e0a84c..b88d6e2f3d1 100644
--- a/cvat/apps/organizations/serializers.py
+++ b/cvat/apps/organizations/serializers.py
@@ -4,10 +4,13 @@
 # SPDX-License-Identifier: MIT
 
 from django.contrib.auth import get_user_model
+from allauth.account.models import EmailAddress
+from allauth.account.adapter import get_adapter
 from django.core.exceptions import ObjectDoesNotExist
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.utils.crypto import get_random_string
+from django.db import transaction
 
 from rest_framework import serializers
 from distutils.util import strtobool
@@ -78,6 +81,7 @@ class Meta:
         fields = ['key', 'created_date', 'owner', 'role', 'organization', 'email']
         read_only_fields = ['key', 'created_date', 'owner', 'organization']
 
+    @transaction.atomic
     def create(self, validated_data):
         membership_data = validated_data.pop('membership')
         organization = validated_data.pop('organization')
@@ -87,11 +91,12 @@ def create(self, validated_data):
             del membership_data['user']
         except ObjectDoesNotExist:
             user_email = membership_data['user']['email']
-            username = user_email.split("@")[0]
-            user = User.objects.create_user(username=username, password=get_random_string(length=32),
+            user = User.objects.create_user(username=user_email, password=get_random_string(length=32),
                 email=user_email, is_active=False)
             user.set_unusable_password()
+            email = EmailAddress.objects.create(user=user, email=user_email, primary=True, verified=False)
             user.save()
+            email.save()
             del membership_data['user']
         membership, created = Membership.objects.get_or_create(
             defaults=membership_data,
@@ -151,6 +156,8 @@ def save(self, request, invitation):
         self.cleaned_data = self.get_cleaned_data()
         user = invitation.membership.user
         user.is_active = True
+        email = EmailAddress.objects.get(email=user.email)
+        get_adapter(request).confirm_email(request, email)
         user.first_name = self.cleaned_data['first_name']
         user.last_name = self.cleaned_data['last_name']
         user.username = self.cleaned_data['username']