VMware Tools should be installed prior to the installation of the Horizon Agent software. To ensure that the master image has the latest version of the VMware Tools software, apply the latest updates to the host ESXi server prior to installing the tools package on the desktop.
The same applies if you are updating your VMware Tools software. The Horizon Agent software should be reinstalled after the VMware Tools software is updated to ensure that the appropriate Horizon drivers are installed in place of the versions included with VMware Tools.