With the announcement at VMworld on the upcoming vSphere 5.5 release, one area that I have been greatly involved with (hence why I have been in stealth mode), has been the new and improved vCenter Single Sign-On. You may still say why do we need it? and why change something that wasn't broke to begin with! but hang in there and let me highlight the changes and the benefits you will see as you begin to look at vCenter Server 5.5.
With the new release, this shows we heard you loud and clear! vCenter Single Sign-On 5.1 at release lacked some expected functionality (limited Active Directory integration), complex to manage (SSL Certificates) as well as lack of guidance on how to best deploy vCenter Single Sign-On. Not to knock the current version with vCenter Server 5.1 Update 1b which is now a very stable platform to build on and guidance available via a recent deployment whitepaper, vCenter Single Sign-On 5.5 builds on these challenges and now provides a rich and fully capable vSphere authentication experience with much of the complexity removed.