SCVMM is failing to add a Host with an error saying:
VMM is unable to complete the request. The connection to the agent hostservername.domain.local (name changed to protect innocent) was lost. (Unknown errror (0x80338126))
Host machine: Server 2008R2 Std - Only role is Hyper-V
SCVMM Machine: Server 2008R2 Std - Roles include: IIS, WSUS, File Server.
Domain: Windows Server 2003 functional level. Domain controller is a Small Business Server 2003 SP2 DC.
WinRM is configured on both servers and winrm id -r:servername commands successfuly return details between both machines. Server's can be remotely administered by use of Server Manager from a third machine. Operating System: Windows Server 2008
Debugview Trace output has the following line of interest:
 0AD4.0FCC::02/04-01:29:13.470#09:ClusterHelper.cs(570): Error getting cluster details for hostservername.domain.local (name changed to protect innocent)
 0AD4.0FCC::02/04-01:29:13.471#09:ClusterHelper.cs(570): System.Management.ManagementException: Invalid namespace
Any help gladly appreciated :-) I've reinstalled SCVMM w/ factory defaults, reenabled WinRM on both boxes, and disabled Windows Firewalls, everything I can think of.