multiple login popups using windows authentication
<p>I'm am developing an application to use windows authentication.</p>

<p>In IIS anonymous access is turned off</p>

<p>In my web.config file I have:</p>

<pre><code>&lt;authentication mode="Windows" /&gt;
</code></pre>

<p>and</p>

<pre><code>&lt;authorization&gt;&lt;allow users="*" /&gt;&lt;/authorization&gt;
</code></pre>

<p>This works fine in the development environment, but when I deploy,
some of the users get a windows login popup. Entering their user name
&amp; password works, but sometimes they need to fill it in several times
during a page load!</p>

<p>Clicking cancel seems to be acceptable, and the pages load after one
or more popups are dismissed.</p>

<p>This does not occur on all client machines, it does not occur
consistently on the same pages either - it all seems quite random!</p>

<p>One user claims that he eventually had his NT account locked out after
canceling too many times (I still need to verify this).</p>

<p>I assume that the problem must be client-side, as it doesn't happen on
every machine. Clients are using IE 6 browsers. Authentication is set
to 'automatic logon only in intranet zone'.</p>

<p>Any ideas what could be causing this?</p>
