New Deployment (Windows) : Veyon Service on clients continually restarting

[Yasdnil1966]

I am a newbie and hoping someone with Veyon deployment experience can spot what is going.

Veyon 4.7.3 is deployed onto all Windows 10 Education machines.
1 Master - 20 clients.
All PC's are on school domain and Veyon has been installed under Domain Administrator account.

Client PC autologin to a local (non-domain) account and start Web Browser (which pupils then use).

But the Veyon service on the clients continually restart - this is happening every 4 seconds.
On the Master - each client flciks between red and orange status continually.

If I start the Veyon configurator on the client machine, under the local account I am prompted for an account that has privileges to run the configurator. Once I provide the Domain Admininstrator account details I can restart the Veyon service - and everything starts to work !

I have checked the Veyon Service and it is started at boot as a Local System service.
I have checked, in the configurator, that access control is for any authenticated account.

So what am I doing wrong / not understanding.

Extract from the Veyon Feature Worker log file :

2022-10-10T11:15:08.906: [DEBUG] VeyonCore::exec(): Exit
2022-10-10T11:15:08.906: [DEBUG] Logger::~Logger(): Shutdown
2022-10-10T11:15:10.343: [DEBUG] PluginManager::loadPlugins(): discovered plugin "AuthKeys" at "C:/Program Files/Veyon/plugins/authkeys.dll"
2022-10-10T11:15:10.343: [DEBUG] PluginManager::loadPlugins(): discovered plugin "BuiltinUltraVncServer" at "C:/Program Files/Veyon/plugins/builtin-ultravnc-server.dll"
2022-10-10T11:15:10.343: [DEBUG] PluginManager::loadPlugins(): discovered plugin "BuiltinDirectory" at "C:/Program Files/Veyon/plugins/builtindirectory.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Demonstration" at "C:/Program Files/Veyon/plugins/demo.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "DesktopServices" at "C:/Program Files/Veyon/plugins/desktopservices.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ExternalVncServer" at "C:/Program Files/Veyon/plugins/external-vnc-server.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "FileTransfer" at "C:/Program Files/Veyon/plugins/filetransfer.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "LDAP Basic" at "C:/Program Files/Veyon/plugins/ldap.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "PowerControl" at "C:/Program Files/Veyon/plugins/powercontrol.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "RemoteAccess" at "C:/Program Files/Veyon/plugins/remoteaccess.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ScreenLock" at "C:/Program Files/Veyon/plugins/screenlock.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Screenshot" at "C:/Program Files/Veyon/plugins/screenshot.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "SystemUserGroups" at "C:/Program Files/Veyon/plugins/systemusergroups.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "TextMessage" at "C:/Program Files/Veyon/plugins/textmessage.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "UserSessionControl" at "C:/Program Files/Veyon/plugins/usersessioncontrol.dll"
2022-10-10T11:15:10.359: [DEBUG] PluginManager::loadPlugins(): discovered plugin "WebAPI" at "C:/Program Files/Veyon/plugins/webapi.dll"
2022-10-10T11:15:10.374: [DEBUG] VeyonCore::initSystemInfo(): "4.7.4" "ICTJUN25.plp.school" "winnt" "10.0.19044" "Windows 10 (10.0)" "windows" "10"
2022-10-10T11:15:10.374: [DEBUG] FeatureWorkerManagerConnection::tryConnection(): connecting to FeatureWorkerManager at port 11300
2022-10-10T11:15:10.374: [INFO] VeyonWorker::VeyonWorker(): Running worker for feature "SystemTrayIcon"
2022-10-10T11:15:10.374: [DEBUG] VeyonCore::exec(): Running
2022-10-10T11:15:10.374: [DEBUG] FeatureWorkerManagerConnection::sendInitMessage(): QUuid("{8e997d84-ebb9-430f-8f72-d45d9821963d}")
2022-10-10T11:15:10.374: [DEBUG] FeatureManager::handleFeatureMessage(): [WORKER] FeatureMessage(SystemTrayIcon,0,{"0":"Veyon Service 4.7.4 at ICTJUN25.plp.school:11100"})
2022-10-10T11:15:10.374: [WARN] QFSFileEngine::open: No file name specified
2022-10-10T11:15:10.451: [DEBUG] FeatureManager::handleFeatureMessage(): [WORKER] FeatureMessage(SystemTrayIcon,0,{"0":"Veyon Service 4.7.4 at ICTJUN25.plp.school:11100\nActive connections:\n::ffff:10.179.0.1"})
2022-10-10T11:15:10.453: [DEBUG] FeatureManager::handleFeatureMessage(): [WORKER] FeatureMessage(SystemTrayIcon,0,{"0":"Veyon Service 4.7.4 at ICTJUN25.plp.school:11100\nActive connections:\nCLASS5JUN"})
2022-10-10T11:15:12.416: [DEBUG] FeatureManager::handleFeatureMessage(): [WORKER] FeatureMessage(SystemTrayIcon,0,{"0":"Veyon Service 4.7.4 at ICTJUN25.plp.school:11100"})
2022-10-10T11:15:12.964: [DEBUG] ---
2022-10-10T11:15:12.964: [DEBUG] Last message repeated 1 times
2022-10-10T11:15:12.964: [DEBUG] ---
2022-10-10T11:15:12.964: [DEBUG] VeyonCore::exec(): Exit
2022-10-10T11:15:12.964: [DEBUG] Logger::~Logger(): Shutdown

[Yasdnil1966]

@Yasdnil1966 Just for the record - the problem above has been solved.

The Veyon Service (as called in the MS Services.msc app) had to be started 'Automatically (Delayed)'

Hopefully this will help someone else who see the same issue.