> ## Documentation Index
> Fetch the complete documentation index at: https://docs.watchdog.no/llms.txt
> Use this file to discover all available pages before exploring further.

# Connect Unit4 ERPx to Watchdog

> Connect Unit4 ERPx to Watchdog and grant access to invoices and documents.

Connect Unit4 to retrieve supplier invoices and documents in Watchdog. Watchdog does not change, post, or pay invoices in Unit4.

## Before you begin

Ask your Unit4 administrator or Unit4 to prepare API access for your environment. Watchdog's connection uses Unit4 WebAPI. You will need:

| Detail        | What to enter                                                                                 |
| ------------- | --------------------------------------------------------------------------------------------- |
| API Base URL  | The WebAPI root, such as `https://.../webapi`                                                 |
| Token URL     | The Unit4 Identity Services token address for your environment                                |
| Client ID     | The client ID for the integration                                                             |
| Client Secret | The secret belonging to that client ID                                                        |
| Scope         | The scope confirmed by Unit4 for your environment; Watchdog uses `u4bw` if the field is empty |

## Connect in Watchdog

1. Open **Integrations → Unit4 ERPx** and add a connection.
2. Enter the details from your administrator or Unit4.
3. Select **Test Connection**, then save the connection.
4. Optionally select companies and suppliers under **Settings**. Without a company filter, Watchdog retrieves invoices from all companies the client can access.

## For the Unit4 administrator

Watchdog uses OAuth2 with `client_credentials` and the WebAPI v1 Object API. The client needs read access to:

* companies and suppliers
* supplier transactions
* the document archive and document content

Confirm the API address, token address, and scope for this specific environment. Use `u4erp` instead of `u4bw` only if Unit4 confirms it is correct for the connection. Agree with Unit4 who creates the client and how company access is assigned.

See [Unit4's description of Identity Services](https://docs-external.u4pp.com/identity-services/external/about/) for authentication between systems.

## If invoices or documents are missing

The test checks a sample of transactions and documents. A warning about a missing document does not necessarily mean sign-in failed. If documents are repeatedly missing, ask your administrator to check access to document content as well as transactions.