There’s some big changes in this one:
Update Rollup 2 for Windows Small Business Server 2011 Essentials is available:
Firstly the Office 365 integration module is included in this.
Next it has fixes for getting Lion OS’s connected better to the server. Mind you the backup from Lion to the Essentials is not fixed as there’s an underlying change in technology that Apple did, but at least the launchpad will now install as it’s supposed to.