We're sorry that there's no official solution at the moment. Do the screens on You can install the latest version and try if changing the "Enable Desktop Duplication Engine on Windows 8 and newer" option in the VNC server options helps.
you can use access control rules to ask for confirmation whenever a client gets accessed, i.e. both monitoring mode and remote view or control. Defining an access control rule for remote control/view only is not possible as the client can't distinguish the accesses. See https://docs.veyon.io/en/latest/admin/access-control-rules.html for more information on access control rules.
welcome to Veyon! Is the same account ("Kasutaja") available on all computers with the same password? The Veyon Service on every computer always tries to authenticate the user locally. It's therefore recommended to work with domain users or set up key file authentication.
The "Run program" feature will always run programs with the privileges of the logged on user. If an administrator is logged on, your files will be launched with administrative privileges. If no user is logged on, for security reasons Veyon refuses to run a program at all.
if you select a single computer before clicking the remote control button in the toolbar this computer will be opened automatically. You can also configure Veyon so that double clicking a computer automatically opens remote control, see the "Feature on double click" option at http://docs.veyon.io/en/latest/admin/reference.html#behaviour for details.