Kolab Howto There are currently 3 known sources with instructions how to install Horde as the web client for Kolab: The official documentation, which hasn't been updated for a while. Some additional instructions in the Kolab wiki. The folks at the Calgary Linux User's Group did a workshop on installing Horde and Kolab, and put together a good start. Their webpage is http://www.clug.ca/node/359, and I've taken the liberty of attaching their handout PDF to this page as well.