Wake on Lan
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Hi, I haven't used Veyon that much, but I remarkably familiar with WOL issues on OptiPlex PCs
Some of our OptiPlex don't WOL until You unplug it from AC power and wait for a minute.But since You say WOL is working from another application, but not working from Veyon, I suggest you install Wireshark and just observe that Veyon generates network packets correctly. If it does problem is on Your side, make sure You've enabled all WOL features in Windows, and UEFI. And check the firewall - it may be blocking outbound WOL packets for some reason.