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I am trying to login to my testuser account through sign in as different user. This gives me an error message saying that it is I am unauthorized to view this page even though the account has read permission. Then I try to login to my full control account and it only succeeds after the third attempt.

This has only happened recently and there have been no major updates/patches applied to the server. Has anyone encountered an issue like this?

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Have you added a custom master page / content or style library item which is unpublished? – Mauro Oct 6 '10 at 15:00
No, everything has been published that was customized. I also tried elevating priviledges on the test account to contribute, but I was still unable to login to the account. – sange Oct 6 '10 at 15:12
I sometimes have to add users to the "Style Resource Readers" group to get them to see the custom style library items – Mauro Oct 6 '10 at 15:20
I was able to do it by going to Tools -> Internet Options -> Security -> Custom Level -> Prompt for user name and password (at bottom) – sange Oct 6 '10 at 16:48
up vote 0 down vote accepted

Mauro is on to something here (see comment above).

Try and fire up Fiddler ( and see what exact request triggers the 401 (unauthorized). Could be an image or css that isnt published.

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I got Fiddler and it showed that there were no requests requiring publishing, it was a problem with my internet explorer autologging in and not allowing me to log into any other account. – sange Oct 7 '10 at 14:20
I'd like to add that Fiddler has helped me a lot in other areas besides this issue and wanted to accept your answer because of that. – sange Oct 21 '10 at 19:11

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