Please note that this is tested with standalone ESXi server 6.0 to upgrade to 6.5. for vCenter users, vCenter 6.5 must be upgraded before upgrade each ESXi host. Preparation It is good idea for you to have a review on follow docs during preparation for the upgrade. 1. VMware vSphere 6.5 Release notes 2. KB article about VMware update sequence for vSphere 6.5 and compatible VMware product 3. Important information before upgrading to vSphere 6.5 Prerequisite 1. Download VMWare vSphere Hypervisor (ESXi) offline bundle ISO file from vmware download page . 2. Create USB stick with bootable ISO of ESXi 6.5 upgrade. => I am using rufus tool to create bootable USB stick. This is free software. How to do steps 1. Reboot ESXi server and change boot order to USB first 2. You will be directed to installation process. -> select disk with ESXi 6.9 installed on . -> Select Upgrade option and OK -> Once it's done reboot syst...