1. A computer implemented method for protecting user privacy when searching digital communication messages within an organization comprising a plurality of client computers, the method comprising the steps of: tracking, by each specific one of the plurality of client computers, digital communication messages processed by the specific client computer; indexing, by each specific one of the plurality of client computers, the digital communication messages tracked by the specific client computer; receiving, at each specific one of the plurality of client computers, a single query made by a first client computer of the plurality of client computers against a base of digital communication messages of the organization; searching, by each specific one of the plurality of client computers, the digital communication messages indexed by the specific client computer, based on the query received from the first client computer, and obtaining a corresponding search result; determining, by each specific one of the plurality of client computers, relevance between the received query and the corresponding search result, wherein determining the relevance further comprises quantifying the relevance of the search result to the query; prompting, by each specific one of the plurality of client computers, a corresponding user operating the specific client computer to indicate whether to respond to the query in response to determining that the relevance meets a criterion, wherein determining that the relevance meets the criterion further comprises determining that the quantified relevance of the search result to the query meets a threshold; receiving, by one or more client computers of the plurality, an indication to respond to the query, responsive to the prompting of the corresponding user; generating, by the one or more client computers of the plurality, one or more responses to the query based on corresponding search results; and transmitting the one or more generated responses, by the one or more client computers of the plurality, to the first client computer.