For those of you administering multiple vSphere environments, getting a SSO multisite deployment up and running in a correct configuration is very important. Multisite deployments are where a local replica is maintained at remote sites of the primary vCenter Single Sign-On instance. The process of setting this up is not complicated, but it is possible to take a wrong turn and end up wasting a whole lot of time correcting it. That is why we have created a best-practice Knowledgebase article titled: Multisite Single Sign-On deployment best practices. (2042849). We highly recommend you look at the examples in that article.
We’ve written extensively in this blog about SSO in the past. You can see all the other posts on the topic here: http://blogs.vmware.com/kb/tag/sso
If you are still at the point where you are asking yourself- what is SSO? and why do I care? we recommend you start with this great introduction from Justin King: vCenter Single Sign-On Part 1: what is vCenter Single Sign-On?