IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
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Elastic Docs ›Elasticsearch Guide [8.15] ›Secure the Elastic Stack ›User authentication

Internal users

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Internal users

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These users are designed for internal use by Elasticsearch only. Authenticating with these users is not supported.

The Elastic Stack security features use eight internal users (_system, _xpack, _xpack_security, _async_search, _security_profile, _data_stream_lifecycle, _synonyms and _storage), which are responsible for the operations that take place inside an Elasticsearch cluster.

These users are only used by requests that originate from within the cluster. For this reason, they cannot be used to authenticate against the API and there is no password to manage or reset.

From time-to-time you may find a reference to one of these users inside your logs, including audit logs.

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