Welcome to the new year and my first blog of 2009.  Let's kick off '09 with a focus on simplification. Let's focus on a topic that often brings chills to a XenApp administrators spine... upgrades.  Back in the day when I was a MetaFrame administrator, I remember the time, patience, and sometimes stress involved with trying to upgrade 100 servers to the latest version of MetaFrame.  Well, a lot has changed in the world of application delivery. MetaFrame went through numerous identity changes to become XenApp. With those new identities we have witnessed a maturing of the product to include more functions, features and abilities to deliver troublesome applications.  But one thing has remained fairly constant, XenApp upgrades are not as easy as flipping a switch.  Take, for example, the following knowledge base article from one of my coworkers, Jo Harder.  Jo created a great article explaining the technical concepts for upgrading and migrating XenApp 4.5 to XenApp 5. It covers the process, what to do and which approach to take.  This document has only been out for 4 months and has been the most read article for each of the past 4 months.  By my estimation, the topic of XenApp migrations is very important to people.