Dear,
In upgrade process vCenter Server 5.1 from vCenter Server 4.1. When register vCenter Server with Single Sign On, at Lookup Service URL, in SSO_host_FQDN_or_IP, I type the localhost that I installed vCenter Server 4.1. But I always receive an error message:" Could not contact Lookup Service. Check VM_ssoreg.log in system temporary folder for details".
I don't know this issue. Please give me a suggest to resolve this prolem.
Many thanks.