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I'm having a problem authenticating users when I attempt to access my site using its URL.

Access and authenticate fine at: "http://SERVERNAME".
DNS record: ""
Alternate Access Map: 
    Zone: "INTRANET"
    URL: ""

The problem is the same user does not authenticate when I access the site at "".

Just wondering what I should check...?

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up vote 1 down vote accepted

I had similar problem in the past and resolved by a registry change. See link below if that helps you

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