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7 changes: 1 addition & 6 deletions docs/reference/configuration.md
Original file line number Diff line number Diff line change
Expand Up @@ -268,12 +268,7 @@ Secret tokens only provide any security if your APM Server uses TLS.
| --- | --- | --- | --- |
| `ELASTIC_APM_API_KEY` | `API_KEY` | `None` | A base64-encoded string |

::::{warning}
This functionality is in technical preview and may be changed or removed in a future release. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features.
::::


This base64-encoded string is used to ensure that only your agents can send data to your APM Server. The API key must be created using the [APM server command-line tool](docs-content://solutions/observability/apm/api-keys.md).
This base64-encoded string is used to ensure that only your agents can send data to your APM Server. The API key can be created in the [Applications UI](docs-content://solutions/observability/apm/api-keys.md#apm-create-an-api-key).

::::{warning}
API keys only provide any real security if your APM Server uses TLS.
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