We encountered a network transmission issue with update KB3189866 published on September 13, 2016, and the quickest way to address this issue was to reissue the update to all Content Delivery Networks. This new update KB3193494 has the same set of fixes as KB3189866. We apologize for any inconvenience this may have caused.
September 20, 2016
OS Builds 14393.187 and 14393.189