Microsoft has released a February update rollup for Windows Server 2012, as well as Windows 8 and Windows RT (8). There’s one included update that Hyper-V or clustering folks should be aware of:
KB2920469 deals with a situation where you cannot change the schedule for CAU self-updating mode in Windows Server 2012 or Windows Server 2012 R2 by using CAU GUI.
Assume that you have a cluster that runs Windows Server 2012 or Windows Server 2012 R2. When you try to change the Cluster-Aware Updating (CAU) schedule by using the GUI, the time for the automatic update schedule is not changed, and the old time remains.
As usual with update rollups, don’t be an IT haemophiliac; delay approval of this update for a month and let the rest of the world be Microsoft’s test lab. If you don’t see any update to this update in one month, then approve and deploy it if you’re happy.