After installing IMSVA 9.0 on an ESXi 5.5 server, VMware tools are not running or appear to be not installed.
You are also not able to install the open source version open-va-tools using the Yum Package Manager from CentOS.
VMware tools are no longer pre-installed in IMSVA version 9.0, following the appliance's move to CentOS. You have to install VMware tools manually.
To guide you on how to manually install VMware tools, refer to the VMware article for vSphere 5.5: VMware Workstation 5.5.