SpecialWindowsAuthenticationHttpVariableName
This flag is for controlling the name of the authentication HTTP variable for: Using Single-Sign-On with RIA Applications.
Valid values: Any HTTP variable in which a Web server sets the name of each authenticated user (such as AUTH_USER, REMOTE_USER, LOGON_USER) that was set in the mgreq.ini file (refer to the link above).
Default value: AUTH_USER
Since version: 3.1