...access the server application, Microsoft demands a clientaccess licence (CAL) for every user that can access an application...Microsoft licences for business users would remain on a client-access basis, whether the software is served to a thin client...
http://www.computerweekly.com/Articles/2000/03/16/175418/fat-or-thin.htm
...NHS's National Programme for IT were prescient 2007.06.29: A reader asks: Are Microsoft's Exchange 2007 ClientAccess Licences part of NHS agreements? 2007.06.28: Alan Johnson - a good choice as political head of NHS's National...
http://www.computerweekly.com/blogs/tony_collins/archives.html