Enterprise Search extends and enhances the search capabilities found in Community Server. New functionality includes advanced query syntax, faster searching, more accurate results, and index attachments to blog posts, forum posts, and gallery files.
Community Server provides two methods of installing Enterprise Search:
You can download Enterprise Search from the Telligent Store http://communityserver.com/get-it-now/.
http://scottwater.com/blog/archive/2006/02/10/search_msdn_blogs.aspx