Microsoft decided to remove the “Sign in as different user” link from the personal menu – at least in SharePoint 2013 Beta 2 (SharePoint 2013 Preview). Of course you could start IE as a different user – but sometimes this is not an option.
There are several recommendations out there to change the “Welcome.ascx” file in order to get the menu entry back. But bear in mind that changing OOB SharePoint Files is not the way that we want to go – especially when thinking about enlarging the farm (or upgrading, or …).
I wrote a small solution that you can add to your farm which brings the “Sign in as different user” back to the personal menu. Even when adding additional servers to your farm, you don’t need to change anything on the new server, it simply works.
Of course we could make this solution multilingual when using the appropriate resx-Files.