The profile must be based on exactly the same firmware version that is installed on the devices.
For further information about profiles, see the manual chapters Profiles (Profiles, http://edocs.igel.com/index.htm#9589.htm) and Creating Profiles (Creating Profiles, http://edocs.igel.com/index.htm#5780.htm).
The UMS 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 license from the UMS and reboot.
Depending on the thin client setting Setup > System > Remote management > Prompt user on UMS actions, the user can cancel this process. After the reboot, the devices have all licensed features.
If the license deployment has been successful, you can remove the profile that deactivates Setup > System > Remote management > Prompt user on UMS actions.