diff --git a/x-pack/plugins/alerts/server/alerts_client/alerts_client.ts b/x-pack/plugins/alerts/server/alerts_client/alerts_client.ts
index b6606d9d7fe5..457079229de9 100644
--- a/x-pack/plugins/alerts/server/alerts_client/alerts_client.ts
+++ b/x-pack/plugins/alerts/server/alerts_client/alerts_client.ts
@@ -817,10 +817,7 @@ export class AlertsClient {
         attributes.consumer,
         WriteOperations.UpdateApiKey
       );
-      if (
-        attributes.actions.length &&
-        !this.authorization.shouldUseLegacyAuthorization(attributes)
-      ) {
+      if (attributes.actions.length) {
         await this.actionsAuthorization.ensureAuthorized('execute');
       }
     } catch (error) {
diff --git a/x-pack/plugins/alerts/server/authorization/alerts_authorization.mock.ts b/x-pack/plugins/alerts/server/authorization/alerts_authorization.mock.ts
index 171e3978d0d0..30de2c79732c 100644
--- a/x-pack/plugins/alerts/server/authorization/alerts_authorization.mock.ts
+++ b/x-pack/plugins/alerts/server/authorization/alerts_authorization.mock.ts
@@ -14,7 +14,6 @@ const createAlertsAuthorizationMock = () => {
     ensureAuthorized: jest.fn(),
     filterByAlertTypeAuthorization: jest.fn(),
     getFindAuthorizationFilter: jest.fn(),
-    shouldUseLegacyAuthorization: jest.fn(),
   };
   return mocked;
 };
diff --git a/x-pack/plugins/alerts/server/authorization/alerts_authorization.ts b/x-pack/plugins/alerts/server/authorization/alerts_authorization.ts
index 6814e4ac1cc1..29f2078bc61e 100644
--- a/x-pack/plugins/alerts/server/authorization/alerts_authorization.ts
+++ b/x-pack/plugins/alerts/server/authorization/alerts_authorization.ts
@@ -8,13 +8,12 @@ import Boom from '@hapi/boom';
 import { map, mapValues, fromPairs, has } from 'lodash';
 import { KibanaRequest } from 'src/core/server';
 import { ALERTS_FEATURE_ID } from '../../common';
-import { AlertTypeRegistry, RawAlert } from '../types';
+import { AlertTypeRegistry } from '../types';
 import { SecurityPluginSetup } from '../../../security/server';
 import { RegistryAlertType } from '../alert_type_registry';
 import { PluginStartContract as FeaturesPluginStart } from '../../../features/server';
 import { AlertsAuthorizationAuditLogger, ScopeType } from './audit_logger';
 import { Space } from '../../../spaces/server';
-import { LEGACY_LAST_MODIFIED_VERSION } from '../saved_objects/migrations';
 import { asFiltersByAlertTypeAndConsumer } from './alerts_authorization_kuery';
 import { KueryNode } from '../../../../../src/plugins/data/server';
 
@@ -112,10 +111,6 @@ export class AlertsAuthorization {
     );
   }
 
-  public shouldUseLegacyAuthorization(alert: RawAlert): boolean {
-    return alert.meta?.versionApiKeyLastmodified === LEGACY_LAST_MODIFIED_VERSION;
-  }
-
   private shouldCheckAuthorization(): boolean {
     return this.authorization?.mode?.useRbacForRequest(this.request) ?? false;
   }
diff --git a/x-pack/plugins/alerts/server/lib/retry_if_conflicts.ts b/x-pack/plugins/alerts/server/lib/retry_if_conflicts.ts
index 9cb1d7975855..59ecc59ab57f 100644
--- a/x-pack/plugins/alerts/server/lib/retry_if_conflicts.ts
+++ b/x-pack/plugins/alerts/server/lib/retry_if_conflicts.ts
@@ -15,9 +15,7 @@ import { Logger, SavedObjectsErrorHelpers } from '../../../../../src/core/server
 type RetryableForConflicts<T> = () => Promise<T>;
 
 // number of times to retry when conflicts occur
-// note: it seems unlikely that we'd need more than one retry, but leaving
-// this statically configurable in case we DO need > 1
-export const RetryForConflictsAttempts = 1;
+export const RetryForConflictsAttempts = 2;
 
 // milliseconds to wait before retrying when conflicts occur
 // note: we considered making this random, to help avoid a stampede, but
diff --git a/x-pack/test/alerting_api_integration/security_and_spaces/tests/alerting/rbac_legacy.ts b/x-pack/test/alerting_api_integration/security_and_spaces/tests/alerting/rbac_legacy.ts
index 992d9210b976..2b25c82cc92e 100644
--- a/x-pack/test/alerting_api_integration/security_and_spaces/tests/alerting/rbac_legacy.ts
+++ b/x-pack/test/alerting_api_integration/security_and_spaces/tests/alerting/rbac_legacy.ts
@@ -62,7 +62,7 @@ export default function alertTests({ getService }: FtrProviderContext) {
           });
         });
 
-        it.skip('should schedule actions on legacy alerts', async () => {
+        it('should schedule actions on legacy alerts', async () => {
           const reference = `alert:migrated-to-7.10:${user.username}`;
           const migratedAlertId = MIGRATED_ALERT_ID[user.username];