I have hundreds of Citrix and Vmware servers. Decided to give Microsoft a try and was going to Migrate to them. Got a Server and installed Hyper-V On it. I did NOT join it to a domain. I completely patched it and all went well. Got a second server and installed Server 2012 R2 Standard. Fully patched it. Went into Hyper-V Manager and tried to connect to the Server and got a MMC error. It gives two options. Report to Microsoft and close or ignore error. When I ignore it gives me the following error, "FX:(922180d7-b74e-45f6-8c74-4b560cc100a5) Type"Microsoft.Virtualization.Client.Common.VirtualizationException' in assembly etc...and says SecurityKeyToken is not marked as serializable. Then at bottom it says Exception Type: System.Runtime.Serialization.SerializationException and has three Exception stack trace:....If I hit ok it closes.
I also formatted the server and installed Server 2012 R2 Standard and did NOT do any patches and I get the same thing. Neither server is joined to a domain. Both are workgroup with static IP's. After I hit ok and the error goes away, the following pops up.