Monday, September 06, 2010 4:36 AM
Hyper-v Error When you connect to VM “An Authentication error has occured.”
Another interesting problem form Hyper-V forum, Cédric from Hyper-V
forum had a problem with new installed Hyper-V server when he tried to
connect to VMs.
From the Hyper-V Manager console, when you try to connect to a local
VM, no problem. But when i try to connect to a VM owned by another
node, you get the following Error.
“Remote Desktop Connection”.
An Authentication error has occured.
The specified data could not be encrypted.
Remote Computer: “FQDN of the targeted host”
All other operation (stop, start etc work perfectly).The cluster validation report was “all green”.
The cluster nodes have this hotfix installed.
- KB977238 (HV BPA)
- KB981791 (Stop Error on intel Westmere)
- And cumulative update 2 for operation manager 2007 R2.
After some digging with MS Support to find the cause of the problem
it turns out to be a problem with CredSSP Kerberos ticket length, there
is a KB for Windows 2008R2 that solved this issue.
This problem occurs because the CredSSP incorrectly encrypts the data
when the size of the security token for the user account exceeds 16
To resolve this issue, install this hotfix on the terminal server
that is running Windows Server 2008 R2 and on any Remote Desktop clients
that are running Windows 7 or Windows Server 2008 R2.