Firmware updates and snapshots which are managed via Universal Firmware Update should no longer be provided on one of the network's UMS servers. It is better to use a dedicated FTP server for this purpose.
On the configuration page for the Universal Firmware Updates option, you can specify your FTP server as the target for the update files. This FTP server will then ensure that the necessary updates are made available to the thin clients. If you have used UMS 3's integrated webserver to distribute the updates, please transfer any updates which are still needed to this FTP server.