ResolutionBy default, you will notice that Virtuozzo leaves the new VE VE in the Workgroup setting.
To join an existing VEVE to a Windows domain, you should do the following:
Select the virtual environment you want to add to the domain and connect to it through the Microsoft Remote Desktop (RDP) as the Admininstrator.
Once your settings have been loaded, select the My Computer icon and right mouse click on it.
From the list of selections, choose its Properties.
Once the Properties panel appears, select the Computer Name tab.
Click on the Change button to change the membership of the server. You will see the Computer Name Changes screen.
From the Computer Name Changes screen, click the radio button for the domain and enter the full domain name as defined in your domain controller (i.e. testdomain.testdc.example.com).
When the domain is found, you will be asked to supply the administrative credentials to join it to the domain.
After successfully joining the VE to the selected domain, Windows will require a reboot of the machine. Once the VEE resets, you will be able to log on the domain with that VE.
Alternatively, a command line utility from Microsoft can be used to join a VEs into a Domain. The utility is called netdom.exe and the description is available in the MS Technet article