6.5.1

Table Of Contents
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For information on vCenter Server behavior in mixed version environments, see Upgrade or Migration
Order and Mixed-Version Transitional Behavior for Multiple vCenter Server Instance Deployments.
Prerequisites
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Verify that your configuration meets the upgrade requirements. See vCenter Server for Windows
Requirements.
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Complete the preparation to upgrade tasks. See Before Upgrading vCenter Server
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Verify that you have made a backup of your vCenter Server configuration and database.
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To verify that the VMware Directory Service is in a stable state and can stop, manually restart it. The
VMware Directory service must be stopped for the vCenter Server upgrade software to uninstall
vCenter Single Sign-On during the upgrade process.
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Download the vCenter Server Installer. See Download the vCenter Server Installer for Windows.
Procedure
1 Download the vCenter Server for Windows ISO file. Extract the ISO file locally, or mount the ISO file
as a drive.
2 In the software installer, double-click the autorun.exe file to start the upgrade.
3 Select vCenter Server for Windows and click Install.
The installer runs checks in the background to discover your existing vCenter Single Sign-On settings
and notify you of any problems that can affect your upgrade process.
The vCenter Server installer opens to the Welcome page.
4 Review the Welcome page and accept the license agreement.
5 Enter your credentials.
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Enter your vCenter Server administrator credentials.
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Enter the administrator@vsphere.local user credential and the vCenter Single Sign-On credential.
The user must be administrator@your_domain_name.
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Click Next.
The installer runs checks in the background to detect any issues that can cause the upgrade to fail.
You might receive a warning if the old certificates do not meet current VMware security standards.
6 Configure the ports and click Next.
Verify that ports 80 and 443 are free and dedicated, so that vCenter Single Sign-On can use these
ports.
The installer checks for the availability of the selected ports, and displays an error message if a
selected port cannot be used.
vSphere Upgrade
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