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+<div>
+  This field works in conjunction with the proxy server field
+  to specify the username used to authenticate with the proxy.
+
+  <p>
+  If this proxy requires Microsofts <a href="http://en.wikipedia.org/wiki/NTLM">NTLM</a>
+  authentication scheme then the domain name can be encoded
+  within the username by prefixing the domain name followed
+  by a back-slash '\' before the username, e.g "ACME\John Doo".
+</div>
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