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Error 8024400E appears on the clients...

After recently deploying a Windows Server 2012 R2 WSUS server (afraid we couldn’t wait much longer for 2016 (which is now out by the way!)) we started seeing Error 8024400E on our clients and servers (from 2008R2/Windows 7 to Server 2012 R2/Windows 10).

As it transpires Microsoft published KB3159706 for the WSUS server which adds some new features to be able to manage Windows 10 updates and thus requires some manual post installation steps which can be found at this link here – https://support.microsoft.com/en-gb/kb/3159706.

The steps only took a few minutes to go through so it was a pretty easy fix in the end.