Hi Malliga,
Sorry, I just removed real username I had, but it was in the proper format with the domain. C:\Windows\System32\runas.exe /user:au\baltevs ""C:\Program Files\Internet Explorer\iexplore.exe"".
The problem is that when you try to select a shortcut as an object, blueprism cuts it to C:\Windows\System32\runas.exe and nothing happens when trying to launch it. So it does not work with a shortcut to my understanding.