I'm actually very comfortable with veyon, so I wanted to know why the PC appears in red (authentication failed or access denied).

From what I see and can perceive, Veyon is used more in Windows than Linux (Ubuntu, Debian) in classrooms and not Linux in classrooms.

My issue is similar - the screen refresh is slow enough to watch it crawl down the screen. That's when connecting to a variety of different systems. Other means of connecting to them - Dameware, RDP, etc - act normally.

I am facing the exact same problem. Did you manage to find any solution?

example: there is a window asking for a password. The window is open and active on all stations.

@ARoger It doesn't work

Go to Veyon Configurator, Locations, and Computers, Go to your Computer list and look for a + icon in the right box, now add it like the other ones you did, and you should be fine.

Following up on this... I wasn't thinking yesterday. What I did was to just create a local user account with the same password as my network account. I actually made two of them because I wasn't sure which one I needed and didn't want to spend too much time in this. I did make these local accounts members of one of the groups that my domain account is a member of, also the same group as the normal local user logs into. Not sure if that's important, but I did it anyway. #1 username and #2 username.domain (not full domain, example .google not the .com part) And now I can see and control this computer, I'll configure the second computer when I have time.

Having a similar issue here. Not using LDAP for anything just key based auth but whenever the master is launched the AD account of the user running it is locked out. Version 4.8.2 Config: { "AccessControl": { "DomainGroupsEnabled": "false", "UserGroupsBackend": "2917cdeb-ac13-4099-8715-20368254a367" }, "Authentication": { "Method": 1 }, "Core": { "ApplicationVersion": 8, "InstallationID": "634bdaa2-e820-4ca8-b94a-7d174b240dd9", "PluginVersions": { "JsonStoreObject": { "{14bacaaa-ebe5-449c-b881-5b382f952571}": "1.1", "{1b08265b-348f-4978-acaa-45d4f6b90bd9}": "1.1", "{1baa01e0-02d6-4494-a766-788f5b225991}": "1.1", "{2917cdeb-ac13-4099-8715-20368254a367}": "1.1", "{2ad98ccb-e9a5-43ef-8c4c-876ac5efbcb1}": "1.1", "{387a0c43-1355-4ff6-9e1f-d098e9ce5127}": "1.1", "{39d7a07f-94db-4912-aa1a-c4df8aee3879}": "1.1", "{4122e8ca-b617-4e36-b851-8e050ed2d82e}": "1.2", "{4790bad8-4c56-40d5-8361-099a68f0c24b}": "1.1", "{67dfc1c1-8f37-4539-a298-16e74e34fd8b}": "1.1", "{6f0a491e-c1c6-4338-8244-f823b0bf8670}": "1.2", "{80580500-2e59-4297-9e35-e53959b028cd}": "1.2", "{8ae6668b-9c12-4b29-9bfc-ff89f6604164}": "1.1", "{a54ee018-42bf-4569-90c7-0d8470125ccf}": "2.0", "{d4bb9c42-9eef-4ecb-8dd5-dfd84b355481}": "1.0", "{e11bee03-b99c-465c-bf90-7e5339b83f6b}": "1.0", "{ee322521-f4fb-482d-b082-82a79003afa7}": "1.1", "{f626f759-7691-45c0-bd4a-37171d98d219}": "1.0" } } }, "Features": { "DisabledFeatures": [ "{6f4cd922-b63e-40bf-9451-536065c7cdf9}" ] }, "LDAP": { "ComputerLocationAttribute": "", "ComputerLocationsByAttribute": "false", "ComputerLocationsByContainer": "false", "LocationNameAttribute": "", "UserLoginNameAttribute": "" }, "Master": { "AccessControlForMasterEnabled": "true", "AllowAddingHiddenLocations": "false", "AutoAdjustMonitoringIconSize": "false", "AutoOpenComputerSelectPanel": "false", "AutoSelectCurrentLocation": "false", "ComputerMonitoringUpdateInterval": 3000, "ConfirmUnsafeActions": "false", "EnforceSelectedModeForClients": "false", "HideComputerFilter": "false", "HideEmptyLocations": "false", "HideLocalComputer": "false", "RemoteAccessImageQuality": 2, "ShowCurrentLocationOnly": "false" }, "Network": { "FirewallExceptionEnabled": "false", "VeyonServerPort": 11100 }, "NetworkObjectDirectory": { "Plugin": "14bacaaa-ebe5-449c-b881-5b382f952571" }, "Service": { "ClipboardSynchronizationDisabled": "true", "FailedAuthenticationNotifications": "true", "HideTrayIcon": "true", "RemoteConnectionNotifications": "true" }, "VncServer": { "Plugin": "39d7a07f-94db-4912-aa1a-c4df8aee3879" }, "Windows": { "SoftwareSASEnabled": "1" } }