Single Sign On authentification for using Drupal in Intranet environment specially on Windows environement. (IE and IIS)

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verta’s picture

Have a look at http://drupal.org/node/324732 - apply the newest patch in the thread and see if that does it for you?

Be careful, though - don't set this up unless you have an LDAP account that you can use to access the admin screens. More info at the link.