diff --git a/dashboards-reports/public/components/report_definitions/report_settings/report_settings.tsx b/dashboards-reports/public/components/report_definitions/report_settings/report_settings.tsx
index 2ecf927a..3317bb5a 100644
--- a/dashboards-reports/public/components/report_definitions/report_settings/report_settings.tsx
+++ b/dashboards-reports/public/components/report_definitions/report_settings/report_settings.tsx
@@ -658,7 +658,11 @@ export function ReportSettings(props: ReportSettingProps) {
       });
 
     await httpClientProps
-      .get('../api/notebooks/')
+      .get('../api/observability/notebooks/')
+      .catch((error: any) => {
+        console.error('error fetching notebooks, retrying with legacy api', error)
+        return httpClientProps.get('../api/notebooks/')
+      })
       .then(async (response: any) => {
         let notebooksOptions = getNotebooksOptions(response.data);
         reportSourceOptions.notebooks = notebooksOptions;
diff --git a/dashboards-reports/server/utils/__tests__/validationHelper.test.ts b/dashboards-reports/server/utils/__tests__/validationHelper.test.ts
index 41ce3b49..cacd3d61 100644
--- a/dashboards-reports/server/utils/__tests__/validationHelper.test.ts
+++ b/dashboards-reports/server/utils/__tests__/validationHelper.test.ts
@@ -65,7 +65,8 @@ const createReportInput: ReportSchemaType = {
   report_definition: createReportDefinitionInput,
 };
 
-const createReportDefinitionNotebookInput: ReportDefinitionSchemaType = {
+// this is the url format used before notebooks merged into observability
+const createReportDefinitionNotebookLegacyInput: ReportDefinitionSchemaType = {
   report_params: {
     report_name: 'test notebooks report',
     report_source: REPORT_TYPE.notebook,
@@ -90,6 +91,31 @@ const createReportDefinitionNotebookInput: ReportDefinitionSchemaType = {
   },
 }
 
+const createReportDefinitionNotebookInput: ReportDefinitionSchemaType = {
+  report_params: {
+    report_name: 'test notebooks report',
+    report_source: REPORT_TYPE.notebook,
+    description: 'Hi this is your Notebook on demand',
+    core_params: {
+      base_url: `/app/observability#/notebooks/${SAMPLE_SAVED_OBJECT_ID}`,
+      window_width: 1300,
+      window_height: 900,
+      report_format: FORMAT.pdf,
+      time_duration: 'PT5M',
+      origin: 'http://localhost:5601',
+    },
+  },
+  delivery: {
+    configIds: [],
+    title: 'title',
+    textDescription: 'text description',
+    htmlDescription: 'html description'
+  },
+  trigger: {
+    trigger_type: TRIGGER_TYPE.onDemand,
+  },
+}
+
 describe('test input validation', () => {
   test('create report with correct saved object id', async () => {
     const savedObjectIds = [`dashboard:${SAMPLE_SAVED_OBJECT_ID}`];
@@ -118,6 +144,16 @@ describe('test input validation', () => {
     expect(report).toBeDefined();
   });
 
+  test('create notebook report definition with legacy base url format', async () => {
+    const savedObjectIds = [`notebook:${SAMPLE_SAVED_OBJECT_ID}`];
+    const client = mockOpenSearchClient(savedObjectIds);
+    const report = await validateReportDefinition(
+      client,
+      createReportDefinitionNotebookLegacyInput
+    );
+    expect(report).toBeDefined();
+  });
+
   test('create notebook report definition with correct base url format', async () => {
     const savedObjectIds = [`notebook:${SAMPLE_SAVED_OBJECT_ID}`];
     const client = mockOpenSearchClient(savedObjectIds);
diff --git a/dashboards-reports/server/utils/validationHelper.ts b/dashboards-reports/server/utils/validationHelper.ts
index 705c8cd0..590e1e9a 100644
--- a/dashboards-reports/server/utils/validationHelper.ts
+++ b/dashboards-reports/server/utils/validationHelper.ts
@@ -37,7 +37,10 @@ import { REPORT_TYPE } from '../../server/routes/utils/constants';
 
 export const isValidRelativeUrl = (relativeUrl: string) => {
   let normalizedRelativeUrl = relativeUrl
-  if (!relativeUrl.includes('notebooks-dashboards')) {
+  if (
+    !relativeUrl.includes('observability#/notebooks') &&
+    !relativeUrl.includes('notebooks-dashboards')
+  ) {
     normalizedRelativeUrl = path.posix.normalize(relativeUrl);
   }
   
@@ -55,7 +58,7 @@ export const isValidRelativeUrl = (relativeUrl: string) => {
 export const regexDuration = /^(-?)P(?=\d|T\d)(?:(\d+)Y)?(?:(\d+)M)?(?:(\d+)([DW]))?(?:T(?:(\d+)H)?(?:(\d+)M)?(?:(\d+(?:\.\d+)?)S)?)?$/;
 export const regexEmailAddress = /\S+@\S+\.\S+/;
 export const regexReportName = /^[\w\-\s\(\)\[\]\,\_\-+]+$/;
-export const regexRelativeUrl = /^\/(_plugin\/kibana\/|_dashboards\/)?app\/(dashboards|visualize|discover|notebooks-dashboards\?view=output_only)([?&]security_tenant=.+|)#\/(view\/|edit\/)?[^\/]+$/;
+export const regexRelativeUrl = /^\/(_plugin\/kibana\/|_dashboards\/)?app\/(dashboards|visualize|discover|observability|notebooks-dashboards\?view=output_only)([?&]security_tenant=.+|)#\/(notebooks\/|view\/|edit\/)?[^\/]+$/;
 
 export const validateReport = async (
   client: ILegacyScopedClusterClient,
diff --git a/dashboards-reports/test/httpMockClient.js b/dashboards-reports/test/httpMockClient.js
index 084f1b85..40efdc2a 100644
--- a/dashboards-reports/test/httpMockClient.js
+++ b/dashboards-reports/test/httpMockClient.js
@@ -38,6 +38,12 @@ httpClientMock.get = jest.fn(() => ({
     })),
     catch: jest.fn(),
   })),
+  catch: jest.fn(() => ({
+    then: jest.fn(() => ({
+      catch: jest.fn()
+    })),
+    catch: jest.fn(),
+  })),
 }));
 httpClientMock.head = jest.fn();
 httpClientMock.post = jest.fn(() => ({