In Jaap's second article on upgrading straight from Exchange Server 2003 to 2010, he explains how to move the various services from Exchange Server 2003 to Exchange Server 2010 and fully decommission the Exchange Server 2003 servers.
In my previous article I explained the initial steps that are needed when you want to upgrade an existing Exchange 2003 environment to Exchange Server 2010.
At this point in the process, you must right click on the enterprise listing for the Recipient Update Service, and then choose the Properties command from the resulting shortcut menu.
In fact there is no direct upgrade, you need to perform what Microsoft calls a "Transition" to Exchange 2010.
This means you prepare your existing Windows domain and Exchange Organisation, to let Exchange 2010 exist, then you build an Exchange 2010 server, migrate your data into it, and finally remove your original Exchange 2003 server.
07/01/15 Before we start, I'm aware "Migration", "Swing Migration", and "Transition" have three very different meanings, depending on which KB, blog or piece of Microsoft documentation you are reading.
Be under no illusions the terminology used in the title and the tags on this page, are to catch the web searches of those who have an Exchange 2003 Server and want to move all their Exchange, to Exchange 2010 server.