---
title: "Set up change reconciliation with ServiceNow"
description: "Connect your ServiceNow instance, match CIs, and turn reconciliation on."
product: "Guardian"
edition: "Essentials"
type: "workflow"
url: "https://docs.cloudhouse.com/guardian/essentials/change-reconciliation/servicenow/"
---
# Set up change reconciliation with ServiceNow

Setup takes three steps: connect your instance, match your CIs, and turn reconciliation on. Start it from **Set up reconciliation** on Detected Drift, or from **Settings** › **Integrations** › **ServiceNow**.

Applies to: `Guardian Essentials` `Additional capability` `ServiceNow`

## Before you start

- You need a ServiceNow account Guardian can use to read change requests and your CMDB: a username and password, or an OAuth client ID and secret.
- Guardian keeps one ServiceNow connection per organisation. If you've already connected ServiceNow, for example to [import CIs](https://docs.cloudhouse.com/guardian/essentials/integrations/servicenow/index.md), reconciliation uses that saved connection.

## Connect

![Step 1, Connect, using a saved ServiceNow connection](https://docs.cloudhouse.com/guardian/essentials/assets/screenshots/reconciliation-connect.png)

Enter your **ServiceNow instance URL** and the credentials, then select **Test & connect**. Guardian checks it can reach the instance before going on.

If ServiceNow is already connected, setup shows the saved connection instead. Check the **Sync Scope**, the CMDB CI classes Guardian imports, and select **Use this connection**.

## Match CIs

![Step 2, Match CIs: matched CIs, and one with no CMDB CI match](https://docs.cloudhouse.com/guardian/essentials/assets/screenshots/reconciliation-match.png)

Guardian syncs CIs from your CMDB and matches them to your Guardian CIs by hostname or IP address. Change requests for matched CIs are reconciled automatically once you confirm.

1. Check the **Matched** list, and how each CI was matched.
2. For any CI under **No CMDB CI match found**, select **Map manually** to choose its CMDB CI, or leave it: unmatched CIs can be mapped later in **Settings** › **Integrations**.
3. Select **Confirm Mapping & Enable Reconciliation**.

If some imports fail, you can still continue to matching: the imports that succeeded are usable. Retry the failed ones later from **Settings** › **Integrations**.

## Reconciliation is on

![Step 3, Recon Active: auto-sync running every 15 minutes](https://docs.cloudhouse.com/guardian/essentials/assets/screenshots/reconciliation-active.png)

**Auto-sync running** confirms Guardian now syncs change requests every 15 minutes and reconciles matching drift in the background. Select **Back to Detected Drift Summary** to see the result.

!!! note "Good to know"
    To change the saved ServiceNow credentials, delete the integration in **Settings** › **Integrations** and connect again.