After you have configured the full-text search feature using the cqtssetup and cqtsdbcrawler commands, use the setmasterpropertyfromfile command enable the feature. The full-text search feature remains enabled until you disable it.
installutil setmasterpropertyfromfile "" bert "" TEXT_SEARCH_PROPERTY CQ_TextSearch.xml
installutil setmasterpropertyfromfile Demo bert "" TEXT_SEARCH_PROPERTY CQ_TextSearch.xml -site Lexington
installutil setmasterpropertyfromfile Demo bert "" TEXT_SEARCH_PROPERTY CQ_TextSearch.xml -remove
installutil setmasterpropertyfromfile Demo bert "" TEXT_SEARCH_PROPERTY CQ_TextSearch.xml -allsites -remove