This configuration variable applies only to Windows servers. When the SECURITY_METHOD configuration variable is set to "LOGON", you can specify a domain name for user logon via another configuration variable. Setting WINNT_LOGON_DOMAIN to the name of a Windows domain logs the user on to that domain. The user logs on to the NULL domain if this variable is not set. Note that the WINNT_LOGON_DOMAIN setting applies only when SECURITY_METHOD is "LOGON".