diff --git a/src/platform/packages/private/kbn-reporting/server/constants.ts b/src/platform/packages/private/kbn-reporting/server/constants.ts
index 3b36a04ec8552..a93b81edfaf76 100644
--- a/src/platform/packages/private/kbn-reporting/server/constants.ts
+++ b/src/platform/packages/private/kbn-reporting/server/constants.ts
@@ -21,6 +21,8 @@ export const REPORTING_DATA_STREAM_WILDCARD = '.kibana-reporting*';
 export const REPORTING_LEGACY_INDICES = '.reporting-*';
 // Used to search for all reports and check for managing privileges
 export const REPORTING_DATA_STREAM_WILDCARD_WITH_LEGACY = '.reporting-*,.kibana-reporting*';
+// Name of index template
+export const REPORTING_DATA_STREAM_INDEX_TEMPLATE = '.kibana-reporting';
 // Name of component template which Kibana overrides for lifecycle settings
 export const REPORTING_DATA_STREAM_COMPONENT_TEMPLATE = 'kibana-reporting@custom';
 
diff --git a/x-pack/platform/plugins/private/reporting/server/lib/store/store.test.ts b/x-pack/platform/plugins/private/reporting/server/lib/store/store.test.ts
index 61d0a636e19f2..0fe37c27ed23a 100644
--- a/x-pack/platform/plugins/private/reporting/server/lib/store/store.test.ts
+++ b/x-pack/platform/plugins/private/reporting/server/lib/store/store.test.ts
@@ -13,10 +13,12 @@ import { Report, ReportingStore, SavedReport } from '.';
 import { ReportingCore } from '../..';
 import { createMockReportingCore } from '../../test_helpers';
 
+type MockEsClient = ReturnType<typeof elasticsearchServiceMock.createElasticsearchClient>;
+
 describe('ReportingStore', () => {
   const mockLogger = loggingSystemMock.createLogger();
   let mockCore: ReportingCore;
-  let mockEsClient: ReturnType<typeof elasticsearchServiceMock.createElasticsearchClient>;
+  let mockEsClient: MockEsClient;
 
   beforeEach(async () => {
     const reportingConfig = {
@@ -455,6 +457,7 @@ describe('ReportingStore', () => {
     it('creates an ILM policy for managing reporting indices if there is not already one', async () => {
       mockEsClient.ilm.getLifecycle.mockRejectedValue({ statusCode: 404 });
       mockEsClient.ilm.putLifecycle.mockResponse({} as any);
+      mockCallsForApplyingMapping(mockEsClient);
 
       const store = new TestReportingStore(mockCore, mockLogger);
       const createIlmPolicySpy = jest.spyOn(store, 'createIlmPolicy');
@@ -478,6 +481,7 @@ describe('ReportingStore', () => {
 
     it('does not create an ILM policy for managing reporting indices if one already exists', async () => {
       mockEsClient.ilm.getLifecycle.mockResponse({});
+      mockCallsForApplyingMapping(mockEsClient);
 
       const store = new TestReportingStore(mockCore, mockLogger);
       const createIlmPolicySpy = jest.spyOn(store, 'createIlmPolicy');
@@ -493,6 +497,9 @@ describe('ReportingStore', () => {
         statefulSettings: { enabled: false },
       };
       mockCore = await createMockReportingCore(createMockConfigSchema(reportingConfig));
+      mockEsClient = (await mockCore.getEsClient()).asInternalUser as typeof mockEsClient;
+
+      mockCallsForApplyingMapping(mockEsClient);
 
       const store = new TestReportingStore(mockCore, mockLogger);
       const createIlmPolicySpy = jest.spyOn(store, 'createIlmPolicy');
@@ -502,3 +509,26 @@ describe('ReportingStore', () => {
     });
   });
 });
+
+function mockCallsForApplyingMapping(mockEsClient: MockEsClient) {
+  mockEsClient.indices.exists.mockResponse(true);
+  mockEsClient.indices.getIndexTemplate.mockResponse({
+    index_templates: [
+      {
+        name: '.kibana-reporting',
+        index_template: {
+          template: {
+            mappings: {
+              properties: {
+                foo: {
+                  type: 'keyword',
+                },
+              },
+            },
+          },
+        },
+      },
+    ],
+  } as any);
+  mockEsClient.indices.putMapping.mockResponse(undefined as any);
+}
diff --git a/x-pack/platform/plugins/private/reporting/server/lib/store/store.ts b/x-pack/platform/plugins/private/reporting/server/lib/store/store.ts
index 38fd5a6036c7c..4c845087a856e 100644
--- a/x-pack/platform/plugins/private/reporting/server/lib/store/store.ts
+++ b/x-pack/platform/plugins/private/reporting/server/lib/store/store.ts
@@ -17,6 +17,7 @@ import type {
 import {
   REPORTING_DATA_STREAM_ALIAS,
   REPORTING_DATA_STREAM_COMPONENT_TEMPLATE,
+  REPORTING_DATA_STREAM_INDEX_TEMPLATE,
 } from '@kbn/reporting-server';
 import moment from 'moment';
 import type { Report } from '.';
@@ -170,12 +171,66 @@ export class ReportingStore {
         await this.createIlmPolicy();
       }
     } catch (e) {
-      this.logger.error('Error in start phase');
-      this.logger.error(e);
+      this.logger.error(`Error creating ILM policy: ${e.message}`, {
+        error: { stack_trace: e.stack },
+      });
+      throw e;
+    }
+
+    try {
+      await this.reapplyMappings();
+    } catch (e) {
+      this.logger.error(`Error applying mappings: ${e.message}`, {
+        error: { stack_trace: e.stack },
+      });
       throw e;
     }
   }
 
+  private async reapplyMappings(): Promise<void> {
+    const client = await this.getClient();
+
+    const exists = await client.indices.exists({
+      index: REPORTING_DATA_STREAM_ALIAS,
+    });
+
+    if (!exists) {
+      this.logger.info(
+        `Mappings not applied to ${REPORTING_DATA_STREAM_ALIAS} since it does not exist.`
+      );
+      return;
+    }
+
+    const gotTemplate = await client.indices.getIndexTemplate({
+      name: REPORTING_DATA_STREAM_INDEX_TEMPLATE,
+    });
+    if (gotTemplate.index_templates.length === 0) {
+      throw new Error(`No index template found for ${REPORTING_DATA_STREAM_INDEX_TEMPLATE}`);
+    }
+
+    const template = gotTemplate.index_templates.find(
+      (t) => t.name === REPORTING_DATA_STREAM_INDEX_TEMPLATE
+    );
+    if (!template) {
+      throw new Error(
+        `No matching index template found for ${REPORTING_DATA_STREAM_INDEX_TEMPLATE}`
+      );
+    }
+
+    const mappings = template.index_template.template?.mappings?.properties;
+    if (!mappings) {
+      throw new Error(`No mappings found for ${REPORTING_DATA_STREAM_INDEX_TEMPLATE}`);
+    }
+
+    await client.indices.putMapping({
+      index: REPORTING_DATA_STREAM_ALIAS,
+      properties: mappings,
+      write_index_only: true,
+    });
+
+    this.logger.info(`Mappings applied to ${REPORTING_DATA_STREAM_ALIAS}`);
+  }
+
   public async addReport(report: Report): Promise<SavedReport> {
     try {
       report.updateWithEsDoc(await this.indexReport(report));