Problem when using 'sign in as a different user'.

  • Problem when using 'sign in as a different user'. Tzn

    I have a standard website (one Web Application and one Site Collection) with some custom pages and webparts.

    The issue I'm having is that when I try to switch users, using the "Sign In As a Different User" and entering new credentials (even for another Site Collection admin account), IE tries the account three times, and then it presents a 401 Access Denied screen.

    After that, if I erase all the stuff of access denied page from the browser's url, I'm logged as the new account I just had entered and was not accepted.

    After researching for a while on google, I found a KB ( ) that might relate, but just tested here and it didn't work at all.

    The modified method suggested by the KB is the following:

    function LoginAsAnother(url, bUseSource) 
        if (bUseSource=="1")
             //var ch=url.indexOf("?") >=0 ? "&" : "?";

    But after making this change, it no longer asks for new credentials.

    Any ideas?

  • One of the first things I would do to troubleshoot is to use Fiddler (or other http traffic analyzer) to have a look at the http requests and responses before using the 'Sign in as.." and those after.

    It may not give you a direct answer, but by inspecting the headers for each successful request, and comparing with those that are failing with 401 responses, it may give a few clues as to what's going on.

2007 authentication
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