Database Administrator's Reference Authenticating Database Users with Windows 10 Authenticating Database Users with Windows Learn about the authentication of Oracle Database users with Windows operating systems. Overview of Windows Native AuthenticationOracle Database can use Windows user login credentials to authenticate database users. About Windows Authentication ProtocolsThe Windows native authentication adapter works with Windows authentication protocols to enable access to Oracle Database. About User Authentication and Role Authorization MethodsDescribes how user login credentials are authenticated and database roles are authorized in Windows domains. Overview of Operating System Authentication Enabled at InstallationWhen you install Oracle Database, a special Windows local group called ORA_DBA is created (if it does not already exist from an earlier Oracle Database installation) and the Oracle Installation User is automatically added to it.