In this article I had described that my PCs had not received a Windows 10 Anniversary Update via Windows Update. I had installed the update manually. A mistake, as I have now discovered:
https://blogs.msdn.microsoft.com/powershell/2016/08/23/powershell-dsc-broken-in-kb3176932/
Exactly one day after my update, the information was published that the Windows 10 Anniversary Update (1607) has problems with the PowerShell DSC and Remote Powershell Sessions.
The following error message occurs when trying to start a remote PowerShell session:
Import-PSSession : Could not load type 'System.Management.Automation.SecuritySupport' from assembly
'System.Management.Automation, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
Administrators of Office 365 in particular should now be a little unhappy, as it is no longer possible to establish a connection to Office 365 via PowerShell.
Microsoft recommends uninstalling the Windows 10 Anniversary Update. However, it is also pointed out that a fix will be distributed via Windows Update on 30.08.2016.
Bevor man also seine Scripte auf Fehler untersucht (wie ich), sollte man also die Windows Version mittels „winver“ prüfen:
Version 1607 is affected by the bug. The Anniversary Update can be uninstalled with the following command:
wusa /uninstall /kb:3176934
I have not tested whether the uninstallation works this way, I am waiting for the fix.