If you enable this policy setting, IE sends a DNT:1 header with all HTTP and HTTPS requests. The DNT:1 header signals to the servers not to track the user.

In Internet Explorer 9 and 10:If you disable this policy setting, IE only sends the Do Not Track header if a Tracking Protection List is enabled or inPrivate Browsing mode is used.

In at least IE11:If you disable this policy setting, IE only sends the Do Not Track header if inPrivate Browsing mode is used.

If you don't configure the policy setting, users can select the Always send Do Not Track header option on the Advanced* tab of the **Internet Options dialog box. By selecting this option, IE sends a DNT:1 header with all HTTP and HTTPS requests; unless the user grants a site-specific exception, in which case IE sends a DNT:0 header. By default, this option is enabled.