> ## Documentation Index
> Fetch the complete documentation index at: https://docs-staging-quickstart-revamp.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> Learn how to view errors and descriptions relating to deprecations.

# Check for Deprecation Errors

When Auth0 features are deprecated, there may be errors or notices in the tenant logs that show up to indicate that your applications are using the deprecated features. This guide will provide assistance with searching your logs for deprecation-related messages as well as explanations of potential causes and resolutions for particular items.

There are two different ways to search for warning messages showing usage of deprecated features: The Dashboard or the <Tooltip tip="Management API: A product to allow customers to perform administrative tasks." cta="View Glossary" href="/docs/glossary?term=Management+API">Management API</Tooltip>. Note that in either case, the [log retention period](/docs/deploy-monitor/logs/log-data-retention) is governed by the subscription level of your account.

## Use the Dashboard

If your application uses a deprecated feature, a **Deprecation Notice** message will appear in the **Logs** section of the Dashboard. Deprecation notices are only shown once per hour (the first time the error occurs within that hour) rather than for each authentication transaction involving the deprecated feature.

1. Go to [Dashboard > Monitoring > Logs](https://manage.auth0.com/#/logs) and search for deprecation-related messages by entering `type:depnote` in the query box. A list of deprecation-related warning messages from your logs will appear, if any exist. The **Description** field provides information on the particular deprecated feature used.
2. Click on the link in the **Type** column for each item to show additional information such as the client ID which identifies the client application using the deprecated feature.
3. Click log entries and select the **Context Data** tab to show details about the item.

## Use the Management API

You can also use the Management API to search through logs for such messages by looking for `type:"depnote"`.

1. Go to the [Management API](https://auth0.com/docs/api/management/v2). If you have not already done so, [get an API token](/docs/secure/tokens/access-tokens/management-api-access-tokens/get-management-api-access-tokens-for-production).
2. On the left, go to [Logs > Search log events](https://auth0.com/docs/api/management/v2/#!/Logs/get_logs) and then scroll down to **Parameters**.
3. In the **q** field enter: `type:"depnote"`.
4. Click on the **TRY** button. The **Client ID** field in the results will indicate which application on your tenant is using the deprecated feature.

## Learn more

* [Log Data Retention](/docs/deploy-monitor/logs/log-data-retention)
* [Logs](/docs/deploy-monitor/logs)