diff --git a/app/events.py b/app/events.py
index 39e01b7..2b740a1 100644
--- a/app/events.py
+++ b/app/events.py
@@ -8,10 +8,11 @@ def setup_events(db):
         get_number_of_active_tickets_cached,
         get_number_of_active_tickets_office_cached,
         get_number_of_active_tickets_task_cached,
+        is_user_office_operator,
     )
     from app.database import (
         Serial, Display_store, Settings, Aliases, Touch_store, Task,
-        Slides_c, Slides, Vid, Office, Settings,
+        Slides_c, Slides, Vid, Office, Settings, User,
     )
 
     serial_funcs = [
@@ -23,7 +24,7 @@ def setup_events(db):
 
     model_action_func_map = {
         (Office, 'insert'): [repeat_announcement, get_all_offices_cached],
-        (Office, 'delete'): [repeat_announcement, get_all_offices_cached],
+        (Office, 'delete'): [repeat_announcement, get_all_offices_cached, is_user_office_operator],
         (Serial, 'update'): serial_funcs,
         (Serial, 'insert'): serial_funcs,
         (Serial, 'delete'): serial_funcs,
@@ -40,6 +41,9 @@ def setup_events(db):
         (Slides, 'insert'): [display],
         (Slides, 'delete'): [display],
         (Settings, 'update'): [get_settings_cached],
+        (User, 'update'): [is_user_office_operator],
+        (User, 'insert'): [is_user_office_operator],
+        (User, 'delete'): [is_user_office_operator],
     }
 
     def clear_cache(session):
diff --git a/app/helpers.py b/app/helpers.py
index 063a8da..d7c1a6a 100644
--- a/app/helpers.py
+++ b/app/helpers.py
@@ -445,3 +445,7 @@ def get_number_of_active_tickets_task_cached(*args, **kwargs):
         .filter_by(p=False)
         .count()
     )
+
+@cache_call(None)
+def is_user_office_operator(user, office):
+    return user and user.id in {o.id for o in office.operators}
diff --git a/app/main.py b/app/main.py
index 0aa28b7..2ca01af 100644
--- a/app/main.py
+++ b/app/main.py
@@ -23,8 +23,8 @@
 from app.views.core import core
 from app.views.customize import cust_app
 from app.views.manage import manage_app
-from app.utils import (absolute_path, log_error, create_default_records, get_bp_endpoints,
-                       in_records)
+from app.utils import (absolute_path, log_error, create_default_records, get_bp_endpoints)
+from app.helpers import is_user_office_operator
 from app.database import Serial
 from app.tasks import start_tasks
 from app.api.setup import setup_api
@@ -208,7 +208,7 @@ def inject_vars():
             get_active_tickets_task=get_number_of_active_tickets_task_cached,
             next=next,
             it=iter,
-            checkId=in_records,
+            is_office_operator=is_user_office_operator,
             offices=get_all_offices_cached(),
             moment_wrapper=moment_wrapper,
             current_path=quote(path, safe=''),
diff --git a/app/utils.py b/app/utils.py
index d05c9e1..5c1d6ce 100644
--- a/app/utils.py
+++ b/app/utils.py
@@ -374,11 +374,6 @@ def check_iterator_empty(iterator):
     return i1, value == unique
 
 
-@functools.lru_cache
-def in_records(id, records):
-    return id in {r.id for r in records}
-
-
 def create_default_records():
     ''' create database necessary records, if not existing. '''
     tables = [data.Display_store, data.Touch_store, data.Slides_c,
diff --git a/templates/sb_manage.html b/templates/sb_manage.html
index 5af990d..21961a9 100644
--- a/templates/sb_manage.html
+++ b/templates/sb_manage.html
@@ -68,7 +68,7 @@
 			<!-- Dropdown--> 
 			{% if not settings.single_row %}
 			{% for office in offices %}
-			{% if getattr(current_user, 'role_id', None) != 3 or checkId(current_user.id, office.operators) %}
+			{% if getattr(current_user, 'role_id', None) != 3 or is_office_operator(current_user, office) %}
 			<li class="panel panel-default da{{ office.id+3 }} {% if ar %} ar1 {% endif %}" id="dropdown">
 			    <a data-toggle="collapse" href="#dropdown-lvl{{ office.id }}">
 				<span class="fa fa-desktop"></span>