Have you set the permissions on the Central Backup device?
What OS are the PCs running?
This is the Help text for setting permissions:
Set user permissions for a centralized backup device
Before you can use an external hard disk (A removable hard disk that connects to your computer and uses a USB or an IEEE 1394 ("FireWire") connection.) or network share (A hard disk drive that's configured to be shared with other computers on the network. The drive can be connected to the network separately or it can be part of or connected to a computer on the network.) as a central backup device (The backup files are stored on a central device that all computers in a OneCare circle can use.) for all computers in your OneCare circle (A small network of computers that share the same Windows Live OneCare subscription.) , you must make sure that all users on the network have the correct permissions to access it.
By default, Windows XP uses simple file sharing (All users on a network can access a shared folder or drive. No user permissions or passwords are required.) . If the external hard drive is connected to a computer that's running Windows XP Home Edition, all users on the network automatically have permission to access the device and the backup files. However, if the external hard drive is connected to a computer that's running Windows XP Professional Edition or Windows Vista, simple file sharing is turned off when you create a backup plan that uses a centralized backup device.
If you are using a network share as a backup device, you must grant permission for users to access the network share. When you grant permission, all users will have access to the backup files.
To set user permissions for a centralized backup device:
- On the network share or external hard disk, navigate to (but do not open) the shared folder or drive that you want to set permissions for.
- Right-click the backup folder or drive, and then click Properties.
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In Windows XP Home Edition, on the Sharing tab, click Share this folder, and then click Permissions.
–or–
In Windows XP Professional Edition or Windows Vista, on the Sharing tab, click Advanced Sharing. Click Share this folder, and then click Permissions.
- Under Group or user names, make sure that Everyone is selected.
- Under Permissions for Everyone, in the Allow column, select the Full Control check box.
-steve
