License Error on VirtualBox

Hello everybody,

The following things state the problem:

• there is a Windows 10 VirtualBox machine installed on the linux host system (Kubuntu 18.04);
• The connection with the license server is established over university VPN (OpenVPN);
• We don't have any local license files in security folder, the licenses are called directly from the server;
• Local environments are added in Windows virtual machine (ALTAIR_LICENSE_PATH);
• Altair License Utility (almutil) shows the connection to the server and sees all available license;
• The server pings;
• Everything works on the physical Windows 10 machine;
• On the virtual machine FEKO and HyperMesh cannot be run and show error message (indicated below);
• Tried to disable the firewall on VM, doesn't help;
• Tried to use NAT and Bridged network adapters, as well as the same MAC addresses, also doesn't help.

 SECFEKO Version 2017.2-26 from 2017-05-26           (compiled for target PC_WIN64_EM64T_MKL, 64 bit)  ERROR  9161:   An error occurred while checking out a licence   Altair License Manager: License error  Feature(s): GlobalZoneAM, HyperWorks, HWFEKOGUI Error Code: 9 Error Description: [NETWORK] 6200@192.168.127.9 - (Err: 9) Feature not found  Feature: FEKOGUI Error Code: 9 Error Description: [LOCAL] C:\Program Files\Altair\2017\security\altair_lic.dat - (Err: 6) Unable to read file [NETWORK] 6200@192.168.127.9 - (Err: 9) Feature not found  License Path: 6200@192.168.127.9;C:\Program Files\Altair\2017\security\altair_lic.dat

Is there any way to run the software on the virtual machine?

Any help appreciated!