When you update targeted StorSimple appliances that have the July 2016 update rollup for Windows 8.1 and Windows Server 2012 R2 installed on Windows Server 2012 R2, iSCSI disks are lost, and logical unit numbers (LUNs) go offline.
How to get this update
Microsoft Update CatalogTo get the stand-alone package for this update, go to the Microsoft Update Catalog website.
PrerequisitesTo install this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows Server 2012 R2.
Registry informationTo apply this update, you do not have to make any changes to the registry.
Restart informationYou may have to restart the computer after you apply this update.
Update replacement informationThis update does not replace a previously released update.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.