diff --git a/src/plugins/data/public/search/session/sessions_client.ts b/src/plugins/data/public/search/session/sessions_client.ts
index dcfc529f99b2b6..1742db9d033bdd 100644
--- a/src/plugins/data/public/search/session/sessions_client.ts
+++ b/src/plugins/data/public/search/session/sessions_client.ts
@@ -68,9 +68,9 @@ export class SessionsClient {
     });
   }
 
-  public extend(sessionId: string, keepAlive: string): Promise<SavedObjectsFindResponse> {
+  public extend(sessionId: string, expires: string): Promise<SavedObjectsFindResponse> {
     return this.http!.post(`/internal/session/${encodeURIComponent(sessionId)}/_extend`, {
-      body: JSON.stringify({ keepAlive }),
+      body: JSON.stringify({ expires }),
     });
   }
 
diff --git a/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/components/actions/extend_button.tsx b/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/components/actions/extend_button.tsx
index 1e2678912ce99f..06459db154f4ae 100644
--- a/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/components/actions/extend_button.tsx
+++ b/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/components/actions/extend_button.tsx
@@ -58,7 +58,9 @@ const ExtendConfirm = ({
         onCancel={onConfirmDismiss}
         onConfirm={async () => {
           setIsLoading(true);
-          await api.sendExtend(id, `${extendByDuration.asMilliseconds()}ms`);
+          await api.sendExtend(id, `${newExpiration.toISOString()}`);
+          setIsLoading(false);
+          onConfirmDismiss();
           onActionComplete();
         }}
         confirmButtonText={confirm}
diff --git a/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/lib/api.test.ts b/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/lib/api.test.ts
index 86acbcdb530016..0fa13ac145223c 100644
--- a/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/lib/api.test.ts
+++ b/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/lib/api.test.ts
@@ -168,7 +168,7 @@ describe('Search Sessions Management API', () => {
 
   describe('extend', () => {
     beforeEach(() => {
-      sessionsClient.find = jest.fn().mockImplementation(async () => {
+      sessionsClient.extend = jest.fn().mockImplementation(async () => {
         return {
           saved_objects: [
             {
@@ -188,6 +188,20 @@ describe('Search Sessions Management API', () => {
       });
       await api.sendExtend('my-id', '5d');
 
+      expect(sessionsClient.extend).toHaveBeenCalledTimes(1);
+      expect(mockCoreStart.notifications.toasts.addSuccess).toHaveBeenCalled();
+    });
+
+    test('displays error on reject', async () => {
+      sessionsClient.extend = jest.fn().mockRejectedValue({});
+      const api = new SearchSessionsMgmtAPI(sessionsClient, mockConfig, {
+        urls: mockUrls,
+        notifications: mockCoreStart.notifications,
+        application: mockCoreStart.application,
+      });
+      await api.sendExtend('my-id', '5d');
+
+      expect(sessionsClient.extend).toHaveBeenCalledTimes(1);
       expect(mockCoreStart.notifications.toasts.addError).toHaveBeenCalled();
     });
   });
diff --git a/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/lib/api.ts b/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/lib/api.ts
index 264556f91cc372..42e9384cce2d86 100644
--- a/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/lib/api.ts
+++ b/x-pack/plugins/data_enhanced/public/search/sessions_mgmt/lib/api.ts
@@ -166,9 +166,6 @@ export class SearchSessionsMgmtAPI {
         }),
       });
     } catch (err) {
-      // eslint-disable-next-line no-console
-      console.error(err);
-
       this.deps.notifications.toasts.addError(err, {
         title: i18n.translate('xpack.data.mgmt.searchSessions.api.deletedError', {
           defaultMessage: 'Failed to delete the search session!',
@@ -178,11 +175,21 @@ export class SearchSessionsMgmtAPI {
   }
 
   // Extend
-  public async sendExtend(id: string, ttl: string): Promise<void> {
-    this.deps.notifications.toasts.addError(new Error('Not implemented'), {
-      title: i18n.translate('xpack.data.mgmt.searchSessions.api.extendError', {
-        defaultMessage: 'Failed to extend the session expiration!',
-      }),
-    });
+  public async sendExtend(id: string, expires: string): Promise<void> {
+    try {
+      await this.sessionsClient.extend(id, expires);
+
+      this.deps.notifications.toasts.addSuccess({
+        title: i18n.translate('xpack.data.mgmt.searchSessions.api.extended', {
+          defaultMessage: 'The search session was extended.',
+        }),
+      });
+    } catch (err) {
+      this.deps.notifications.toasts.addError(err, {
+        title: i18n.translate('xpack.data.mgmt.searchSessions.api.extendError', {
+          defaultMessage: 'Failed to extend the search session!',
+        }),
+      });
+    }
   }
 }