Hi, We've got a simple 2 server farm that hosts our intranet portal. I've recently configured single sign-on as per http://technet.microsoft.com/en-us/library/cc262932.aspx#Section1 and when I try to open up a word document, for example, my account does not get prompted for login but other users do. After an investigation, I've realised that when I switch to another pc, it also prompts me which leads me to believe that it could be desktop related. Has anyone had this before? What desktop/browser settings could be affecting the single sign-on? As far as I know, all of our browser settings should be the same as it is rolled out the same from our group IT. Thanks M