1. A method comprising: displaying, by an e-mail client application operating on a client computer of a user, a user interface comprising a middle pane and adjacent panes, wherein an adjacent pane comprises a list of folders; setting, by the e-mail client application in response to input from the user, a webpage of a search application hosted by a server computer system as a homepage of a folder displayed in the adjacent pane, wherein the server computer system indexes data from a plurality of applications on the server computer system which is stored in one or more databases accessed by the server computer system, the plurality of applications comprising different web-based applications that are accessible by the user via a web-browser application of the client computer of the user, each different web-based application offering a search interface; displaying, by the e-mail client application, a search interface in response to selection by the user of the folder displayed in the adjacent pane of the user interface; submitting, by the e-mail client application to the search application hosted by the server computer system, a search query entered by the user into the search interface displayed by the email client application, wherein the search query is submitted to the web page of the search application set as the homepage of the folder displayed in the adjacent pane of the email client application; displaying, by the email client application in the middle pane of the user interface, search results returned by the server computer system in response to the search query, the search results comprising data from multiple web-based applications, wherein the data from the multiple web-based applications includes only data to which the user has security rights; and in response to selection by the user of a search result associated with a respective web-based application of the plurality of applications, accessing the respective web-based application on the server computer system via the web-browser application of the client computer for allowing the user to access data from the respective web-based application which is included in the search result selected by the user.