The m23 client needs to have installed the m23 virtualisation package ”m23VirtualBox” to be capable of creating and running virtual m23 clients. The package can be found under ”Special packages (for skilled users only)” in the package installation dialogue (Packages
Install) in the m23 administration interface and can be installed on any m23 client.
Remember that the VM host needs enough free disk space and free memory and adequate CPU power, because all virtual machines share the resources of the host's physical hardware.