I find Windows Backup is a really good tool although I have one problem. By default Windows Backup will occupy 70% of the space available. It can be limited when you're using an external drive or something directly attached to the computer. However when you save to a network path there seems to be no way to limit the space used, and this is a problem when you have multiple computers backing up to the same location. Is there a way to limit the space used by Windows backup when saving to a network path?
That figure should be 30 %, not 70 %. But i think after the initial backup, all backups are incremental and dont add much space. It may also be possible to partition the network drive and use one partition per computer backup- that'll limit the backup to max of the partition size which you can set.
This doesn't actually work with network paths - only storage devices directly attached to the machine. In the end I started using Bacula because for the number of hosts it seems like the best option.