 <p>The AppFabric configuration tool updates the web.config file in at this location only</p> <blockquote> <p>C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Config\web.config</p> </blockquote> <p>When building with the "Any CPU" option as I was you must manually edit this file</p> <pre><code>C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config </code></pre> <p>With these settings (from the Framework64 version)</p> <pre><code>&lt;connectionStrings&gt; &lt;add connectionString="Data Source=(local);Initial Catalog=AppFabricMonitoringDB;Integrated Security=True" name="ApplicationServerMonitoringConnectionString" providerName="System.Data.SqlClient" /&gt; &lt;add connectionString="Data Source=(local);Initial Catalog=AppFabricPersistenceDB;Integrated Security=True" name="ApplicationServerWorkflowInstanceStoreConnectionString" providerName="System.Data.SqlClient" /&gt; &lt;/connectionStrings&gt; </code></pre> <p>They were previously set to the default</p> <pre><code>&lt;connectionStrings&gt; &lt;add connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=AppFabricMonitoringDB;Integrated Security=True" name="ApplicationServerMonitoringConnectionString" providerName="System.Data.SqlClient" /&gt; &lt;add connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=AppFabricPersistenceDB;Integrated Security=True" name="ApplicationServerWorkflowInstanceStoreConnectionString" providerName="System.Data.SqlClient" /&gt; &lt;/connectionStrings&gt; </code></pre>