This section describes how to upgrade vCenter Servers from 6.7 U3g to 7.0 U3c in Active, Passive, and Witness nodes, if your vCenter Server Appliance is configured in a vCenter High Availability (HA) cluster.


Follow the Prerequisites for Upgrading vCenter Server High Availability Environments.


The upgrade sequence of vCenter Server VMs must be Witness => Passive => Active.


  1. Upgrade the vCenter Server Appliance 6.7 U3g HA Cluster with an Embedded Platform Services Controller to 7.0 U3c by Using the vCenter Server GUI.

    When you upgrade, ensure that Stage 1 and Stage 2 processes are completed properly.

  2. Upgrade the Distributed Switches from version 6.7 to 7.0.