vCenter Server 5.5 does not support Windows Server 2003 as a host machine, and does not support upgrades from Windows Server 2003 hosts. You can install vCenter Server 5.5 and related components on a supported host and migrate configuration data from your existing Windows Server 2003 installation.

Verify that the new host machine meets the requirements for vCenter Server 5.5. See System Requirements.

Review the topics in Preparing for the Upgrade to vCenter Server.

Download the vCenter Server installer.

1

vCenter Server 5.5 does not support Windows Server 2003 hosts for vCenter Server. When you migrate from a Windows Server 2003 host to a host that is supported for vCenter Server 5.5, install vCenter Single Sign-On on the new host.

2

The vSphere Web Client lets you connect to a vCenter Server system to manage your vSphere deployment through a browser.

3

When you migrate from a Windows Server 2003 host to a host that is supported for the version 5.5 vCenter Server, you can also migrate some configuration data.

4

When you migrate from a Windows Server 2003 host to a host that is supported for vCenter Single Sign-On 5.5, you can also migrate Inventory Service SSL certificates and configuration data.

5

After you migrate Inventory Service SSL certificates and configuration data from a Windows Server 2003 host to a host that is supported for Inventory Service 5.5, you can install Inventory Service on the new host.

6

When you migrate from a Windows Server 2003 host to a host that is supported for vCenter Single Sign-On 5.5, you can also migrate the vCenter Server database and SSL certificates.

7

After you migrate vCenter Server SSL certificates from a Windows Server 2003 host to a host that is supported for vCenter Server 5.5, you can install vCenter Server on the new host.