You are encouraged to sign up and install the latest build of the beta program for Windows Home Server Power Pack 1 from https://connect.microsoft.com/windowshomeserver in preparation for the Power Pack 1 download. Additional information on how to prepare a home server for testing the beta of Power Pack 1 is outlined on the Microsoft Connect site.

The Power Pack 1 download is planned to be available in early June.  We intend to allow for adequate time for feedback and thorough testing during the beta process.  The timeline for a final release will depend on feedback and testing, in order to deliver a fix of the highest quality.

Source:→ Microsoft