3.4. Using Folder Redirection and Offline Files over Slow Links
In Windows 2000 and Windows XP, Offline Files thinks a slow link is 64Kbps. Since no analog modem is going to achieve that speed, every normal dial-up user theoretically will be coming in over a slow link. When a user comes in over a slow link (less than 64Kbps), the system automatically uses their locally cached version of network files. Additionally, files will not sync when users log on.
Figure 3.39. The action-based schedule synchronization options
Windows Vista handles things differently. It assumes every connection to a share is a fast link until told otherwise. You'll see ...