Windows microsoft 7 turn automatic updating off
The main reason is the client has cached the file when it has accessed to this file in read mode.
Then only the difference (block of data that has changed for a file) is synchronized on a regular bases or when logon (background), logoff and Slow Link change.
However, since sparse files are unavailable while offline, it is necessary that they be filled prior to disconnecting from the network.
Optimized file synchronization: One of the performance enhancements of Offline Files in Windows Vista is a faster synchronization process.
Choosing among these scenarios, and understanding the key capabilities and limitations of each, is a key task.
By default, network folders in the "slow-link" mode will be synchronized with the server every 360 minutes with the start of the sync varying between 0 and 60 additional minutes.If a file is modified on the server when you are offline, Offline Files in Windows Vista or Windows 7 will copy the whole file to your local cache during synchronization.