Article ID: 6509, created on Jul 9, 2009, last review on May 10, 2014

  • Applies to:
  • Plesk 9.x for Windows
  • Plesk 8.x for Windows
  • Plesk 7.x for Windows
  • Virtuozzo containers for Windows


If an incorrect Parallels Panel license is installed the following warning appears:

The license key is invalid. In order to use the Control Panel, please obtain and install a new functioning license key. The license key is intended only for use with Plesk inside Virtuozzo environments.


The tool below is used to detect whether Parallels Panel is installed in Parallels Containers or physical server.


It returns 0 if this is a physical server and container ID if Parallels Panel is installed in a container.

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