Multiple changes made, including updates to descriptions for various FeatureIds: https://msdn.microsoft.com/en-us/library/mt242388.aspx
Changes to multiple processing rules – see https://msdn.microsoft.com/en-us/library/dn785067.aspx for details.
Changes to multiple field definitions. See https://msdn.microsoft.com/en-us/library/mt847171.aspx for details.
Corrected a number of data structure and element names: https://msdn.microsoft.com/en-us/library/mt845779.aspx
Two new reserved Language ID values were added: https://msdn.microsoft.com/en-us/library/mt803169.aspx
One new case for setting security information and new related processing rules were added: https://msdn.microsoft.com/en-us/library/mt242397.aspx
Updates made to the Command message options: https://msdn.microsoft.com/en-us/library/mt242381.aspx
Updates were made to the name of the message used by the WDS server on failure: https://msdn.microsoft.com/en-us/library/mt846794.aspx
Text was added/modified to describe the Taskbar Tab Info PDU (TS_RAIL_ORDER_TASKBARINFO): https://msdn.microsoft.com/en-us/library/mt449537.aspx
Three changes to field and structure descriptions at https://msdn.microsoft.com/en-us/library/mt242409.aspx