Configuring vCenter Single Sign-On for high availability requires two machines. One machine acts as the primary node, and the other as the backup node. When configured for high availability, both nodes work with the same database, use the same data, and have the same user stores


Obtain or create two virtual machines.

Create two virtual machines running a Windows guest operating system.

Obtain two physical machines running a Windows operating system.


Create a DNS entry for each virtual machine.


(Optional) If you use Active Directory and want vCenter Single Sign-On to discover it automatically, do the following tasks.

Put both machines in the same Active Directory domain.

Assign administrative permissions on both machines to the Active Directory domain user with which you run the installation.

The machines are ready to become vCenter Single Sign-On nodes.

Install vCenter Single Sign-On to create the nodes.