VSS Policy Binding
Use the VSS Policy Binding property page to bind storage snapshots to back up policies or management classes. VSS policies determine how backups are managed and retained.
VSS policy statements are processed from the end to the beginning and processing stops when the first matching statement is reached. To ensure that more specific statements are processed, specify the more general specification before the more specific ones.
The policy statements do not take effect on existing or new backups until the next backup is issued.