Add STS reference is missing in vs.net 2012

VS.net 2012 by default included the Windows Identity Framework and its SDK. However, if you try to right-click the project, you won't be able to find the "Add STS reference" in the context menu.

This has been changed in vs.net 2012 and called "Identity & Access" as below,

 

 

To be able to use this, you need to go to Tools -> Extensions and Updates -> Enter "Identity" in search to install the "Identity and Access Tool" first, then restart vs.net 2012.