WSUS Update Services Error: Connection Error
Most of the times this happens due to the pending configuration of KB3159706. There are some manual steps to be completed if the above update is installed on the server.
Detailed Steps – https://support.microsoft.com/en-us/help/3159706/update-enables-esd-decryption-provision-in-wsus-in-windows-server-2012
Open CMD with Administrative privileges and execute below command as shown in the image.
"C:\Program Files\Update Services\Tools\wsusutil.exe" postinstall /servicing
After complete the post installation open Server Manager and add HTTP Activation on .NET Framework 4.5 Features.
Go to Services.msc and restart WSUS Service. Also make sure to delete MMC Console cache located at %appdata%\Microsoft\MMC
After that I was able to open the console. But the KB article requires below changes too.
CMD go to “C:\Program Files\Update Services\WebServices\ClientWebService\” path and execute below command to take the ownership of the file.
takeown /f Web.config
(Trick: If you receive any access denied error, make a copy and rename the original web.config file and change the copy to the original name)
Now assign the ownership of the Web.config file to the administrators group.
Now open the config file and make sure to check the value multipleSiteBindingsEnabled=”true” Detailed steps available here.
Now restart the server and open WSUS Console.
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