This policy setting allows you to define the user experience related to pop-up windows and tabbed browsing in Internet Explorer. ...

This policy setting allows you to define the user experience related to pop-up windows and tabbed browsing in Internet Explorer.

If you enable this policy setting, the user will not be able to configure the tabbed browsing pop-up behavior. You will have to specify the behavior desired.

The value choices are:
0: Let Internet Explorer decide.
1: Force pop-up windows to open in new windows.
2: Force pop-up windows to open in new tabs.

If you disable or do not configure this setting, the user's setting for tabbed browsing pop-up behavior will be used.