diff --git a/x-pack/plugins/alerts/server/saved_objects/index.ts b/x-pack/plugins/alerts/server/saved_objects/index.ts
index da30273e93c6b..dfe122f56bc48 100644
--- a/x-pack/plugins/alerts/server/saved_objects/index.ts
+++ b/x-pack/plugins/alerts/server/saved_objects/index.ts
@@ -16,6 +16,7 @@ export const AlertAttributesExcludedFromAAD = [
   'muteAll',
   'mutedInstanceIds',
   'updatedBy',
+  'updatedAt',
   'executionStatus',
 ];
 
@@ -28,6 +29,7 @@ export type AlertAttributesExcludedFromAADType =
   | 'muteAll'
   | 'mutedInstanceIds'
   | 'updatedBy'
+  | 'updatedAt'
   | 'executionStatus';
 
 export function setupSavedObjects(
diff --git a/x-pack/plugins/alerts/server/saved_objects/partially_update_alert.test.ts b/x-pack/plugins/alerts/server/saved_objects/partially_update_alert.test.ts
index 50815c797e399..8041ec551bb0d 100644
--- a/x-pack/plugins/alerts/server/saved_objects/partially_update_alert.test.ts
+++ b/x-pack/plugins/alerts/server/saved_objects/partially_update_alert.test.ts
@@ -95,6 +95,7 @@ const DefaultAttributes = {
   muteAll: true,
   mutedInstanceIds: ['muted-instance-id-1', 'muted-instance-id-2'],
   updatedBy: 'someone',
+  updatedAt: '2019-02-12T21:01:22.479Z',
 };
 
 const InvalidAttributes = { ...DefaultAttributes, foo: 'bar' };