# User logon (classic)

A *user logon* is an activity that takes place when a user authenticates in a device to open a session and gain control over it.

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RELATED CONCEPT

* [User](https://docs.nexthink.com/platform/references/references-classic/glossary-classic/user-classic)

RELATED REFERENCE

* [Boot and logon duration](https://docs.nexthink.com/platform/references/references-classic/database-information-and-organization-classic)