Add to web-client-config-custom.xml
<simple-search-additional-attributes> <qname> {http://www.alfresco.org/model/content/1.0}description </qname> <qname> {http://www.alfresco.org/model/content/1.0}title </qname> <qname> {http://www.mycompany.com/model/content/1.0}customID </qname> </simple-search-additional-attributes>