You can remove the Wake on LAN proxy function from a thin client.
To define one or more thin clients as Wake on LAN Proxy:
The dialog Edit Wake ON LAN Proxies opens.
The selected thin client is no longer configured as a Wake on LAN proxy. As soon as the client has received its settings from the UMS, it can be set to standby and shut down as normal. In the thin client's registry, the parameter system > remotemanager > wol_proxy > enabled is set to false.