Is Single Sign On required in a small deployment?

[Labcoat]

I'm reading through everything to upgrade my vCenter from 4.1 to 5.1.  I use a single VM for my vCenter Server, and currently the local administrator to login to it with vSphere Client.

Stupid question time: do I _have_ to install SSO?  I doubt I will use the web client at all, and will just continue to use vSphere and a single VM host for vCenter.

[Eternal_Snow]

Yes.

[marcelo_soares]

You need to install both. SSO is required, and you only can administrate SSO from Web Client. dead end