It was a little difficult to find the answer but here's how.
pages 14-15
To modify the Web proxy service on VirtualCenter Server 2.5 to support HTTP
1 Log in to the VirtualCenter Server system as the Windows Administrator of the machine.
2 Change to the directory containing the proxy.xml file:
c:\Documents and Settings\AllUsers\Application Data\VMware VirtualCenter
3 Use a text editor to open the proxy.xml file.
4 Find the section of the file associated with the /sdk.
5 Change the accessMode to httpAndHttps.
6 Restart the VirtualCenter Service from a command line or from the Windows Services control panel.
To modify the Web proxy service on ESX Server 3.5 to support HTTP
1 Log in to the service console as the root user.
2 Change directories to /etc/vmware/hostd.
3 Use a text editor to open the proxy.xml file.
4 Navigate to the list of endpoints in the file (identified by the <EndpointList> tag) that contains settings for
the Web service supporting the SDK. The nested tags may look something like this:
...
<e id="1">
<_type>vim.ProxyService.NamedPipeServiceSpec</_type>
<accessMode>httpsWithRedirect</accessMode>
<pipeName>/var/run/vmware/proxy-sdk</pipeName>
<serverNamespace>/sdk</serverNamespace>
</e>
...
5 Change the accessMode to httpAndHttps. Alternatively, to completely disable HTTPS, you can set to
httpOnly.
6 Optionally, change the setting for the MOB as well.
7 Save your settings and close the file.
8 Restart the vmware-hostd process by entering the following command:
service mgmt-vmware restart
Hope that helps.
