I've been trying to setup a Server Code system for hours now and nothing works. I'm guessing the root of the issue is that neither the Win2012R2 server nor the Win8.1 client are part of a domain but I can't believe I'm the first one trying to do that.
So I installed the RSAT tools and started up mmc. I add snap-ins, but when trying to connect to the server's IP the only thing I get are Error 5: Access Denied. I disabled the firewall on both systems, ran winrm quickconfig, I looked around the web and all I could find are posts related to DCOM security, saying to go to Component Services and making sure that the Default Authentication Level is set to Connect, which it is. I tried directly through Server Manager, same thing.
I did find out that I can run MMC to connect to a domain server using runas /netonly /user:Administrator "mmc", but it doesn't work when trying to connect to this non-domain joined server.
Obviously I have to enter credentials somewhere, yet MMC never asks for that, strangely enough. I'm used to always using RDP to remote into servers but can't here since it's Server Core. I can't figure this out.
Best Answer
I believe that you need to specify user@domain as the username when you use the runas command. Otherwise you are defaulting to your local administrator account.