Nico_K, can you confirm that newer versions of KACE virtual appliances will handle installing and updating of the Open-vm-tools? We need an official communication from Quest KACE on this as I'm sure you can appreciate. We need to know that a future version of the KBOX appliances will handle this to ensure communication with VMware is maintained, or KACE will migrate to a different Linux OS that VMware do still support with VMtools. According to the, you just need to download 'VMware Tools packages for FreeBSD, Solaris and OS X' and use the one called freebsd.iso. In the kb it says to also download the 'Windows and Linux' iso as well. But I'm not sure what that one is needed for. The KB is definitely lacking in details.
VMware Tools (vmtools) are periodically updated to include improved drivers, bug fixes, and better OS support. With vSphere 6.5, the tools package is now split into two distinct ones, one for Legacy operating systems, some of which are no longer supported by the original vendor and one for current operating systems. In the below example, VMware ESXi 6.0 provides forward compatibility with the virtual machines running newer version of VMware Tools such as VM tools from ESXi 6.5 U1 and also it support backward compatibility with virtual machines running older version of VM Tools from ESXi upto ESXi 5.0.