Latest Windows Patch “KB3159398” Kills Mapped Drives & Printers on Server 2012 R2

On Tuesday June 14, 2016 Microsoft release patch KB3159398 that was supposed to resolve a number of security related issues with Microsoft Windows. Due to this patch we have seen an influx in client support requests regarding missing mapped drives and missing shared printers. Uninstalling the update is not recommended, we had to manually changed security permissions on the GPO for each client with this issue. We hope this helps IT professionals, it took us an hour to figure out that we had a problem and fix it, but with much research.