How to configure snapshot (volume shadow copy) on Windows Server 2008 File Server.
Previous versions in Windows Server 2008 allows you restore files to certain points in time when user accidentally modify the file. This feature is enabled for you by default in Windows Server 2008, unlike earlier versions. To configure the snapshot schedule, follow below directions.
1. Open Computer, Right click on the Volume, choose properties
2. On Shadow Copies tab, select the disk, click the Settings button
3. Click the schedule button and you may change the schedule from there.