Update Rollup 2 for Windows Server 2012 Essentials has been available now for about a month, and I have finally made time to test it out.
The Update Rollup is available via Windows Update and is 102MB in size. When I installed it in my test lab, the whole process took about 5 minutes including the download, so it isn’t a demanding patch to install.
If you have installed the Update Rollup 2 Beta make sure you uninstall it first before installing the latest Update Rollup2.
Details of the issues fixed with Update Rollup 2 can be found: http://support.microsoft.com/kb/2824160
But in summary, the main fixes are with Office 365 integration and improvements to Bonjour Service.