If you want to ensure that the licensing process cannot be canceled by the user, create a profile in which Setup > System > Remote management > Prompt user on UMS actions is deactivated.
If applicable, assign the profile to the thin clients in question.
Go to UMS Administration > Licenses > Deployment and ensure that Enable automatic license deploment is activated. Every 5 minutes, the UMS looks for registered devices without a valid license. If the UMS finds an unlicensed device, it orders a license from the licensing server. When ordering a license, the UMS sends the device's unit ID to the licensing server; each license is bound to the unit ID of a device. The licensing server creates the licenses and sends them to the UMS. The UMS stores the licenses and adds a download link to the device settings. Afterwards, the UMS sends the current settings to the devices. When the devices have received the settings, they download their licenses from the UMS and reboot. After the reboot, the devices have all licensed features.
If a device cannot be reached by the UMS when it tries to send the new settings, it will not receive the new license immediately. If the device has a firmware version lower than IGEL OS version 10.03.500, the new settings must be re-sent manually later on. If the device has IGEL OS version 10.03.500 or higher, it will handle this automatically by periodically asking the UMS if a license is available. If yes, it will get the current settings including the download link, download the license from the UMS, and reboot.
