diff --git a/src/api/__tests__/live-stalwart-event-notifications.test.ts b/src/api/__tests__/live-stalwart-event-notifications.test.ts
index 6f35a0df..fdc8366c 100644
--- a/src/api/__tests__/live-stalwart-event-notifications.test.ts
+++ b/src/api/__tests__/live-stalwart-event-notifications.test.ts
@@ -159,8 +159,11 @@ liveTwo('live Stalwart calendar event notifications', () => {
     const cancel = notes.find((n) => n.calendarEventId === attendeeEventId && !ours.has(n.id));
     expect(cancel, JSON.stringify(notes)).toBeTruthy();
     ours.add(cancel!.id);
+    // Both servers send it as an update that sets the status to cancelled
+    // (the attendee's copy stays, cancelled); it must read as a cancellation.
     const toast = eventNotificationToast(cancel!, t)!;
-    if (cancel!.type === 'destroyed') expect(toast.type).toBe('warning');
+    expect(toast.type, JSON.stringify(cancel)).toBe('warning');
+    expect(toast.title).toContain(`cancelled "${RUN} review"`);
 
     await destroyCalendarEventNotifications([...ours]);
     const after = (await getCalendarEventNotifications()).map((n) => n.id);
diff --git a/src/api/calendar-event-notifications.ts b/src/api/calendar-event-notifications.ts
index deaf3ae3..6ba2bf35 100644
--- a/src/api/calendar-event-notifications.ts
+++ b/src/api/calendar-event-notifications.ts
@@ -20,8 +20,20 @@ export interface CalendarEventNotification {
   type: 'created' | 'updated' | 'destroyed';
   calendarEventId: string;
   isDraft?: boolean;
-  /** The event as it is now; 1.0 returns it, 0.16 leaves it out. */
+  /** The event before the change on 1.0 (as created for an invitation); 0.16 leaves it out. */
   event?: { title?: string | null } | null;
+  /**
+   * What changed, for an `updated` one: a JSCalendar patch on 1.0, the whole
+   * event as it is now on 0.16. An organizer's cancellation reaches the
+   * attendee as an update that sets `status` to `cancelled` (iTIP CANCEL
+   * keeps the attendee's copy), never as `destroyed`.
+   */
+  eventPatch?: { status?: string | null; title?: string | null } | null;
+}
+
+/** An organizer cancelled the event: the change sets its status to cancelled. */
+export function isCancellation(n: Pick<CalendarEventNotification, 'type' | 'eventPatch'>): boolean {
+  return n.type === 'destroyed' || (n.type === 'updated' && n.eventPatch?.status === 'cancelled');
 }
 
 const USING = [CAPABILITIES.CORE, CAPABILITIES.CALENDARS];
@@ -42,7 +54,7 @@ export async function getCalendarEventNotifications(): Promise<CalendarEventNoti
     ['CalendarEventNotification/get', {
       accountId,
       '#ids': { resultOf: '0', name: 'CalendarEventNotification/query', path: '/ids' },
-      properties: ['id', 'created', 'changedBy', 'comment', 'type', 'calendarEventId', 'isDraft', 'event'],
+      properties: ['id', 'created', 'changedBy', 'comment', 'type', 'calendarEventId', 'isDraft', 'event', 'eventPatch'],
     }, '1'],
   ], USING);
   const responses = (response.methodResponses ?? []) as [string, any, string][];
diff --git a/src/lib/__tests__/calendar-event-notifications.test.ts b/src/lib/__tests__/calendar-event-notifications.test.ts
index 751a3c1d..92c72431 100644
--- a/src/lib/__tests__/calendar-event-notifications.test.ts
+++ b/src/lib/__tests__/calendar-event-notifications.test.ts
@@ -10,7 +10,8 @@ const h = vi.hoisted(() => ({
 
 vi.mock('react-native', () => ({ AppState: { addEventListener: vi.fn() } }));
 vi.mock('../../api/jmap-client', () => ({ jmapClient: h.client }));
-vi.mock('../../api/calendar-event-notifications', () => ({
+vi.mock('../../api/calendar-event-notifications', async (importOriginal) => ({
+  ...(await importOriginal<typeof import('../../api/calendar-event-notifications')>()),
   getCalendarEventNotifications: h.list,
   destroyCalendarEventNotifications: h.destroy,
 }));
@@ -71,6 +72,17 @@ describe('the toast for a calendar event notification', () => {
       .toEqual({ type: 'warning', title: 'Land cancelled "Planning"', message: 'Sorry, ill' });
   });
 
+  it('says cancelled, as a warning, when the organizer cancels (an update setting status cancelled)', () => {
+    // What Stalwart 1.0.1 sends the attendee after CalendarEvent/set destroy
+    // with sendSchedulingMessages; 0.16.27 sends the whole event as the patch.
+    expect(eventNotificationToast(note('4', { eventPatch: { sequence: null, status: 'cancelled' } as never }), t))
+      .toEqual({ type: 'warning', title: 'Land cancelled "Planning"', message: undefined });
+    expect(eventNotificationToast(note('5', { event: null, eventPatch: { title: 'Planning', status: 'cancelled' } }), t)!.type)
+      .toBe('warning');
+    // Any other change stays an update.
+    expect(eventNotificationToast(note('6', { eventPatch: { title: 'Planning v2' } }), t)!.type).toBe('info');
+  });
+
   it('falls back to the address, then "Someone", and to an untitled event', () => {
     expect(eventNotificationToast(note('1', { changedBy: { email: 'x@example.org' }, event: null }), t)!.title)
       .toBe('x@example.org updated "Untitled event"');
diff --git a/src/lib/calendar-event-notifications.ts b/src/lib/calendar-event-notifications.ts
index b25e7d2b..8f21ca1b 100644
--- a/src/lib/calendar-event-notifications.ts
+++ b/src/lib/calendar-event-notifications.ts
@@ -3,6 +3,7 @@ import { jmapClient } from '../api/jmap-client';
 import {
   destroyCalendarEventNotifications,
   getCalendarEventNotifications,
+  isCancellation,
   type CalendarEventNotification,
 } from '../api/calendar-event-notifications';
 import { useAuthStore } from '../stores/auth-store';
@@ -33,7 +34,9 @@ export interface EventNotificationToast {
 /** The toast for one notification; null for a draft (the user's own unsent change). */
 export function eventNotificationToast(n: CalendarEventNotification, t: Translate): EventNotificationToast | null {
   if (n.isDraft) return null;
-  const kind = n.type === 'created' ? 'invited' : n.type === 'destroyed' ? 'cancelled' : 'updated';
+  // Stalwart sends an organizer's cancellation as an update setting the
+  // status to cancelled (the webmail reads only `type` and says "updated").
+  const kind = n.type === 'created' ? 'invited' : isCancellation(n) ? 'cancelled' : 'updated';
   const params = {
     name: n.changedBy?.name || n.changedBy?.email || t('calendar_event_notifications.someone', 'Someone'),
     title: n.event?.title || t('calendar_event_notifications.untitled', 'Untitled event'),