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I'm managing several servers with SCVMM, and just the other day the VMM console lost connection to the server, and is now refusing to connect. I think it coincided with the CU3 update that came over Windows Update, but that might be a red herring.

When I try to open the console, the splash screen shows for several seconds, then it switches to a "Attempting to reconnect" window, saying "The connection to Virtual Machine Manager Server […] was lost.", which closes almost immediately, replaced by the splash screen again.

I ran the debug logs on both the host and the client site, and on the host side I've dug out the following exceptions:

System.Runtime.InteropServices.COMException (0x80338102): The WS-Management service cannot process the request. The WMI service reported that the WMI provider could not perform the requested operation.

Later in the log:

System.ServiceModel.CommunicationObjectAbortedException: The communication object, System.ServiceModel.Channels.ServerSessionPreambleConnectionReader+ServerFramingDuplexSessionChannel, cannot be used for communication because it has been Aborted.

And later:

System.ServiceModel.CommunicationException: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '10675199.02:48:05.4775807'

On the console side:

Microsoft.VirtualManager.Utils.CarmineException: The connection to the VMM management server sc-vmm was lost. Ensure that sc-vmm is online and that you can access the server remotely from your computer. Then connect to sc-vmm and try the command again using the new connection. Or, you can ensure that the Virtual Machine Manager service is started on sc-vmm. Then connect to sc-vmm and try the command again using the new connection. If the command fails again because of a connection failure, restart the Virtual Manager service and then try the operation again.

By the way, I can run commands against the server in powershell from the server, so it seems to be running.. It seems to be just the consoles acting up.

And yes, I have installed UR3 for the console.

Any idea what may have caused it and how to fix it?

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So after a bunch of time trying different things, I stumbled on a blog post, saying to close all VMM Consoles before running the installed.. Seems like I forgot to close one on a remote server, and that messed up the installer.

So what I had to do is download the UR3 installer again (there are download links here) and install it AGAIN on the same server, using msiexec.

After doing that on both clustered servers, and restarting them just in case, the consoles now open!

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