ECM (Enterprise content management ) - is a set of technologies used to capture, store, preserve and deliver content and documents and content related to organizational processes. ECM tools allow the management of an organization's unstructured information, wherever that information exists.
ECM employed the technologies and strategies of content management to address business process issues, such as records and auditing, knowledge sharing, personalization and standardization of content, and so on.
Microsoft has announced an update to the mouthful "Microsoft Office SharePoint Server for Search 2007" -- which is now called "Search Server 2008", but is still the somewhat stripped-down version of the full search engine included in MOSS 2007. In addition to those two versions, however, Redmond now also offers Search Server 2008 Express -- a download available for free. So what's the catch? The "Express" version is fully featured, and has no document limit or any of the other usual crippling limitations. Of course, there is a such a thing as a free lunch: you'll have to buy a drink to go with it. In this case, if you want to use more than just one server for your search engine -- and high volume usage might quite quickly warrant scaling your infrastructure -- you'll have to shell out the money for the full version. By that time, you're probably already relying on your search engine and will have no alternative than to pay up