diff --git a/components/settings/__tests__/vacation-calendar-block.test.tsx b/components/settings/__tests__/vacation-calendar-block.test.tsx
index 81dce2d98..8b9d46efa 100644
--- a/components/settings/__tests__/vacation-calendar-block.test.tsx
+++ b/components/settings/__tests__/vacation-calendar-block.test.tsx
@@ -26,7 +26,7 @@ const client = {
 
 function lock(value: boolean | null) {
   const policy = usePolicyStore.getState().policy;
-  usePolicyStore.setState({ policy: { ...policy, restrictions: value === null ? {} : { vacationBlockCalendar: { locked: true, value } } } });
+  usePolicyStore.setState({ policy: { ...policy, defaults: {}, restrictions: value === null ? {} : { vacationBlockCalendar: { locked: true, value } } } });
 }
 
 describe('VacationCalendarBlock', () => {
@@ -61,6 +61,18 @@ describe('VacationCalendarBlock', () => {
     expect(box.closest('[inert]')).not.toBeNull();
   });
 
+  it('shows what the sync does for a lock without a value, and nothing when hidden', async () => {
+    const policy = usePolicyStore.getState().policy;
+    usePolicyStore.setState({ policy: { ...policy, defaults: { vacationBlockCalendar: false }, restrictions: { vacationBlockCalendar: { locked: true } } } });
+    const view = render(<VacationCalendarBlock hasDates />);
+    expect(((await screen.findByTestId('vacation-block-calendar')) as HTMLInputElement).checked).toBe(false);
+    view.unmount();
+    usePolicyStore.setState({ policy: { ...policy, defaults: {}, restrictions: { vacationBlockCalendar: { hidden: true } } } });
+    const hidden = render(<VacationCalendarBlock hasDates />);
+    await waitFor(() => expect(client.getAllCalendars).toHaveBeenCalled());
+    expect(hidden.container.querySelector('[data-testid="vacation-block-calendar"]')).toBeNull();
+  });
+
   it('says a managed account\'s calendar can\'t be blocked without write access', async () => {
     client.getAllCalendars.mockResolvedValueOnce([{ id: 'boss:b', isDefault: true, isShared: true, accountId: 'boss', myRights: { mayWriteAll: false, mayWriteOwn: false } }] as never);
     render(<VacationCalendarBlock hasDates accountId="boss" />);
diff --git a/components/settings/vacation-calendar-block.tsx b/components/settings/vacation-calendar-block.tsx
index 8de77ac0d..9911ff2b9 100644
--- a/components/settings/vacation-calendar-block.tsx
+++ b/components/settings/vacation-calendar-block.tsx
@@ -8,7 +8,8 @@ import { useAuthStore } from '@/stores/auth-store';
 import { useSettingsStore } from '@/stores/settings-store';
 import { useVacationStore } from '@/stores/vacation-store';
 import { useRestriction } from '@/hooks/use-restriction';
-import { blockCalendar, ownFilterScriptStops, vacationBlockChanged } from '@/lib/vacation-calendar';
+import { blockCalendar, ownFilterScriptStops, resolveBlockSetting, vacationBlockChanged } from '@/lib/vacation-calendar';
+import { usePolicyStore } from '@/stores/policy-store';
 
 /**
  * "Block my calendar" under the out-of-office dates (lib/vacation-calendar.ts):
@@ -22,7 +23,9 @@ export function VacationCalendarBlock({ hasDates, accountId }: { hasDates: boole
   const setting = useSettingsStore((s) => s.vacationBlockCalendar);
   const updateSetting = useSettingsStore((s) => s.updateSetting);
   const restriction = useRestriction('vacationBlockCalendar');
-  const checked = restriction.locked && typeof restriction.value === 'boolean' ? restriction.value : setting !== false;
+  const policyDefault = usePolicyStore((s) => s.policy.defaults?.vacationBlockCalendar);
+  // The same resolution as the sync (lib/vacation-calendar.ts).
+  const { value: checked, locked, hidden } = resolveBlockSetting(restriction, policyDefault, setting);
   const [access, setAccess] = useState<{ key: string; ok: boolean } | null>(null);
   const id = useId();
   const key = accountId ?? '';
@@ -40,7 +43,7 @@ export function VacationCalendarBlock({ hasDates, accountId }: { hasDates: boole
     return () => { cancelled = true; };
   }, [client, supported, hasDates, accountId, key]);
 
-  if (!client || !supported || !hasDates) return null;
+  if (!client || !supported || !hasDates || hidden) return null;
   if (access?.key === key && !access.ok) {
     return (
       <p className="pb-2 text-xs text-muted-foreground" data-testid="vacation-block-no-access">
@@ -56,7 +59,7 @@ export function VacationCalendarBlock({ hasDates, accountId }: { hasDates: boole
   };
 
   return (
-    <SettingItem label={t('label')} description={t('description')} locked={restriction.locked}>
+    <SettingItem label={t('label')} description={t('description')} locked={locked}>
       <input
         id={id}
         type="checkbox"