5.0 Device Retirement  If you retire a device, the device is
removed from your ZENworks Management Zone. Retiring a device is
different from deleting a device. When you retire a device, its
GUID is retained (as opposed to when you delete a device, which
also deletes its GUID). As a result, all inventory information
is retained and is assessable but all assignments (folder,
configuration settings, and so forth) are removed. If you
unretire the device in the future, its assignments are restored.
You can retire both managed and inventoried devices.