Please don't bother to respond to this post unless you know EXACTLY what Outlook is doing when it is Synchronizing Folders and are either willing and capable of explaining it clearly or can lead us to a source that can. This forum seems to be loaded with threads that have been stopped cold by well meaning (perhaps smarta-- or uninformed?) responders who assume that the questioner already knows what it is.
A simple search of this forum (or Google) will show that there is a genuine need for basic information about the subject.
1. What exactly is Outlook doing when it is Synchronizing Folders??
2. Under what circumstances is it needed?
3. If there are circumstances when it is not needed, how do you turn it off in Outlook 2010, 2007, and 2003?
4. Why does searching Help in Outlook or Office not explain what it is? Is this something that developers have overlooked or are every reasonable person and my grandmother supposed to intuitively know what it is?