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Integrated Windows Authentication
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<p>Integrated Windows Authentication (IWA) is a term associated with <a href="/facts/Microsoft/nGIDDXdx">Microsoft</a> products that refers to the <a href="/facts/SPNEGO/Btqy4ffy">SPNEGO</a>, <a href="/facts/Kerberos_(protocol)/RMXs3P1w">Kerberos</a>, and <a href="/facts/NTLMSSP/oWcdeSAb">NTLMSSP</a> authentication protocols with respect to <a href="/facts/Security_Support_Provider_Interface/lIeS9tug">SSPI</a> functionality introduced with Microsoft <a href="/facts/Windows_2000/amJIt9gz">Windows 2000</a> and included with later <a href="/facts/Windows_NT/EtccWvxQ">Windows NT</a>-based operating systems. The term is used more commonly for the automatically authenticated connections between Microsoft <a href="/facts/Internet_Information_Services/nqmfJr3T">Internet Information Services</a>, <a href="/facts/Internet_Explorer/uL8a4Y5l">Internet Explorer</a>, and other <a href="/facts/Active_Directory/VWd9HhjU">Active Directory</a> aware applications. </p><p>IWA is also known by several names like <i><a href="/facts/HTTP/TWtvf7JD">HTTP</a> Negotiate authentication</i>, <i>NT Authentication</i>, <i>NTLM Authentication</i>, <i>Domain authentication</i>, <i>Windows Integrated Authentication</i>, <i>Windows NT Challenge/Response authentication</i>, or simply <i>Windows Authentication</i>. </p>