[Setting] SendEmailToUserAlias [Description] 
This value works with DefaultHostName. When SendEmailToUserAlias is set to true, users who define individual subscriptions are automatically specified as recipients of the report. The To field is hidden. If this value is false, the To field is visible. Set this value to true if you want maximum control over report distribution. Valid values include the following: True=The e-mail address of the user creating the subscription is used. This is the default value. False=Any e-mail address can be specified.