VMware recently announced vSphere 6.5 release. Dell supports direct upgrade to ESXi 6.5 from both ESXi 6.0 Update 2 and ESXi 5.5 Update 3. This document talks about some of the best practices to be considered before upgrading to ESXi 6.5 in terms of UEFI Secureboot. This white paper is relevant for all users who plan to migrate to Dell customized version of VMware ESXi 6.5 and make use of UEFI secureboot feature. The white paper can be downloaded from here