PRB: Request.ServerVariables("LOGON_USER") Returns Empty String

ID: Q188717

The information in this article applies to:

Active Server Pages
Microsoft Internet Information Server versions 4.0, 5.0

SYMPTOMS

Accessing the Request.ServerVariables("LOGON_USER") variable from Active Server Pages (ASP) returns an empty string.

CAUSE

The LOGON_USER variable is not populated if the ASP page is accessed using Allow Anonymous security.

In order for the LOGON_USER variable to be populated, the user must be authenticated using either Basic or NT Challenge/Response security.

STATUS

This behavior is by design.

REFERENCES

For additional information, please see the following article in the Microsoft Knowledge Base:

Q142868 IIS: Authentication & Security Features

Additional query words: allow anonymous LOGON_USER ASP ServerVariables Request kbASP

Keywords : kbASP kbASPObj kbScript kbSecurity kbGrpASP kbiis400 kbiis500
Version : winnt:
Platform : winnt
Issue type : kbprb