TPOV

If you have previously purchased a Virtuozzo Parallels Management Console license for use with your Virtuozzo 3.x hardware nodes, you had to use that license whenever you registered your first hardware node in your VZMC Pro.

You might have noticed that the VZMC Pro license has since moved to the Virtuozzo Hardware Node itself. As long as you register at least one Virtuozzo 3.x hardware node in your VZMC Pro, you will be able to use the Management Console without any problems; you will be prompted for the license when you register your first Virtuozzo 3.x hardware node. After that, you can manage your Virtuozzo 3.x and 4.x hardware nodes.

But if you have upgraded all your hardware nodes to Virtuozzo 4.x, you will never be prompted to install your ‘old’ license rendering the Management Console useless.

But you can manually install the license. It’s not documented in the Parallels Knowledge Base, but it works perfectly;

Simply open up the directory that holds the application data for the Management Console installation (e.g. C:\ProgramData\SWsoft\Virtuozzo Management
Console on Windows 7) and create a new file in that folder called ‘license.pro’. Open up that file and paste your license key in it. Save it and start the Management Console. You will now be able to manager your hardware nodes again, as you were used to.

There is one other way, and that is the method that Parallels Support will offer you;

To be able to manage your PVC4.0 nodes through PMC you need to assign a valid IP address to the service container (id is always #1) on a PVC4.0 node (you can use an internal ip address but this IP address must be solved and reachable from PMC) and then you need setup vzagent0 account for the service container:
# vzctl set 1 -userpasswd vzagent0:NEW_PASSWORD
and start the Virtuozzo3 support on the PVC4.0 node:
# vzagent_compat_ctl start
Then while you register this node use ‘vzagent0′ account, ip address of Service container and corresponding password. You should be asked about VZMC license during the PVC node registration.
How to assign an ip address to the service container you can find here:
http://kb.parallels.com/en/1089