This tip could help a lot of people that needs to support locked-down or low privileged machines/users.
Sometimes integrated authentication may not work if an user for some reason saved an Internet Explorer password and then changed it on the Active Directory.
So it may be necessary to clean that password through “Stored Users and Passwords” applet.
To do so, you need, with user logged in, open the applet through a command prompt or a batch file.
The command-line to open it is this one:
Hope this helped someone!