diff --git a/x-pack/plugins/security_solution/server/endpoint/migrations/ensure_indices_exists_for_policies.test.ts b/x-pack/plugins/security_solution/server/endpoint/migrations/ensure_indices_exists_for_policies.test.ts
new file mode 100644
index 0000000000000..834f6c12a067f
--- /dev/null
+++ b/x-pack/plugins/security_solution/server/endpoint/migrations/ensure_indices_exists_for_policies.test.ts
@@ -0,0 +1,46 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { createMockEndpointAppContextService } from '../mocks';
+import { ensureIndicesExistsForPolicies } from './ensure_indices_exists_for_policies';
+import { createPolicyDataStreamsIfNeeded as _createPolicyDataStreamsIfNeeded } from '../../fleet_integration/handlers/create_policy_datastreams';
+
+jest.mock('../../fleet_integration/handlers/create_policy_datastreams');
+const createPolicyDataStreamsIfNeededMock = _createPolicyDataStreamsIfNeeded as jest.Mock;
+
+describe('Ensure indices exists for policies migration', () => {
+  let endpointAppContextServicesMock: ReturnType<typeof createMockEndpointAppContextService>;
+
+  beforeEach(() => {
+    endpointAppContextServicesMock = createMockEndpointAppContextService();
+
+    endpointAppContextServicesMock
+      .getInternalFleetServices()
+      .packagePolicy.listIds.mockResolvedValue({
+        items: ['foo-1', 'foo-2', 'foo-3'],
+      });
+  });
+
+  it('should query fleet looking for all endpoint integration policies', async () => {
+    const fleetServicesMock = endpointAppContextServicesMock.getInternalFleetServices();
+    await ensureIndicesExistsForPolicies(endpointAppContextServicesMock);
+
+    expect(fleetServicesMock.packagePolicy.listIds).toHaveBeenCalledWith(expect.anything(), {
+      kuery: fleetServicesMock.endpointPolicyKuery,
+      perPage: 10000,
+    });
+  });
+
+  it('should call createPolicyDataStreamsIfNeeded() with list of existing policies', async () => {
+    await ensureIndicesExistsForPolicies(endpointAppContextServicesMock);
+
+    expect(createPolicyDataStreamsIfNeededMock).toHaveBeenCalledWith({
+      endpointServices: endpointAppContextServicesMock,
+      endpointPolicyIds: ['foo-1', 'foo-2', 'foo-3'],
+    });
+  });
+});
diff --git a/x-pack/plugins/security_solution/server/endpoint/migrations/ensure_indices_exists_for_policies.ts b/x-pack/plugins/security_solution/server/endpoint/migrations/ensure_indices_exists_for_policies.ts
index 70b898dee29cd..778a333fc4818 100644
--- a/x-pack/plugins/security_solution/server/endpoint/migrations/ensure_indices_exists_for_policies.ts
+++ b/x-pack/plugins/security_solution/server/endpoint/migrations/ensure_indices_exists_for_policies.ts
@@ -11,6 +11,8 @@ import type { EndpointAppContextService } from '../endpoint_app_context_services
 export const ensureIndicesExistsForPolicies = async (
   endpointServices: EndpointAppContextService
 ): Promise<void> => {
+  const logger = endpointServices.createLogger('startupPolicyIndicesChecker');
+
   const fleetServices = endpointServices.getInternalFleetServices();
   const soClient = fleetServices.savedObjects.createInternalUnscopedSoClient();
   const endpointPoliciesIds = await fleetServices.packagePolicy.listIds(soClient, {
@@ -18,6 +20,10 @@ export const ensureIndicesExistsForPolicies = async (
     perPage: 10000,
   });
 
+  logger.info(
+    `Checking to ensure [${endpointPoliciesIds.items.length}] endpoint policies have backing indices`
+  );
+
   await createPolicyDataStreamsIfNeeded({
     endpointServices,
     endpointPolicyIds: endpointPoliciesIds.items,