I had a client where all the updates were failing to install and returned the error code: 80072EFE
Most of the other forums and kb articles referred to incorrect Date/Time configurations or Firewall related issues. Both of these settings were correctly configured and did not provide the solution.
Seeing that the error is related to a connection time-out to the wsus server or Software Update Management point, I figured I would check the connection from the client, to the SUM point.
I did a ping to the SUM point server and received intermittent timed-out messages for my ping request and once this issue was resolved, the updates started installing.
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