The value of the sv_AppEnableIntegration key must be set to true in order to enable the Web Client to use functionality that requires the Application Enabler API, such as re-indexing using the Application Client Connector. By default, the value is set to false.
To change this key, locate the <add key="sv_AppEnableIntegration" key under the <appSettings> node and change the value attribute to true or false.
Note:
In order to use the Application Enabler API functionality the database must be licensed for Application Enabler.