Microsoft Search Server

[1] MSS shared its architectural underpinnings with the Windows Search platform for both the querying engine and the indexer.

The relevance determination algorithm was developed by Microsoft Research and Windows Live Search.

The handlers and iFilters MSS used are the same as used by SharePoint, Microsoft SQL Server and Windows Search as well.

[4] The administration UI, which was also presented as a web application, could be used to review statistics such as most frequent queries, top destination hits, click through rates etc., as well as fine tune relevancy settings,[5] indexing policies (including inclusion and exclusion filters) and schedules, and set up a cluster of the servers.

ACLs could also be defined to limit the search result according to the rights of the user initiating the query.

The Search Center UI showing the local search results with federated search results on the right