Siebel Analytics Server Administration Guide > Security in Siebel Analytics > Authentication Options >

Order of Authentication

If the user does not type a logon name, then OS authentication is triggered, unless OS authentication is explicitly turned off in the NQSConfig.INI file. (See Siebel Analytics Installation and Configuration Guide for details.) OS authentication is also not used for Siebel Analytics Web users.

The Siebel Analytics Server populates session variables using the initialization blocks in the desired order, which are specified by the dependency rules defined in the initialization blocks. If the server finds the session variable USER, it performs authentication against an LDAP server or an external database table, depending on the configuration of the initialization block with which the USER variable is associated.

Siebel Analytics Server internal authentication (or, optionally, database authentication) occurs only after these other possibilities have been considered.