6.5.1

Table Of Contents
4 If you have vSphere HA clusters, SSL certificate checking must be enabled.
If certificate checking is not enabled when you upgrade, vSphere HA fails to configure on the hosts.
a Select the vCenter Server instance in the inventory panel.
b Under the Configure tab, click General.
c Verify that the SSL settings field is set to vCenter Server requires verified host SSL
certificates.
Your ESXi hosts are ready for vCenter Server upgrade.
Verify Preparations Are Complete for Upgrading vCenter Server
Verify that all components of your environment are ready to upgrade vCenter Server.
Your pre-upgrade configuration of vCenter Server services determines your post-upgrade deployment
type.
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If your vCenter Server 5.5 service and vCenter Single Sign-On 5.5 service are deployed on the same
virtual machine or physical server, the installer upgrades them to vCenter Server 6.5 with an
embedded Platform Services Controller instance. See About the vCenter Server for Windows
Upgrade Process.
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If your vCenter Server 5.5 service and vCenter Single Sign-On 5.5 service are deployed on different
virtual machines or physical servers, the installer upgrades them to vCenter Server 6.5 with an
external Platform Services Controller instance. For information on the consolidation of distributed
services during the upgrade, see Distributed vCenter Server 5.5 for Windows Services Relocation
During Upgrade or Migration and Example Upgrade Paths for vCenter Server version 5.5 to version
6.5.
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If you have vCenter Server 6.0, your current deployment type is preserved during the upgrade.
For information on synchronizing clocks, see Synchronizing Clocks on the vSphere Network.
To download the installer, see Download the vCenter Server Installer for Windows
Prerequisites
After you have verified basic compatibility and upgrade readiness for your database, network, local
database communication, and ESXi hosts, you are ready to perform the final tasks to assure upgrade
readiness of your environment.
Procedure
1 Log in as a member of the Administrators group on the host machine, with a user name that does not
contain non-ASCII characters.
vSphere Upgrade
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